diff --git a/docs/GamUpdates.md b/docs/GamUpdates.md
index 5ed6e1cd..6fbe545c 100644
--- a/docs/GamUpdates.md
+++ b/docs/GamUpdates.md
@@ -10,6 +10,14 @@ Add the `-s` option to the end of the above commands to suppress creating the `g
 
 See [Downloads-Installs](https://github.com/taers232c/GAMADV-XTD3/wiki/Downloads-Installs) for Windows or other options, including manual installation
 
+### 6.79.09
+
+Added option `addcsvdata <FieldName> <String>` to `gam <UserTypeEntity> print teamdriveacls` that adds
+additional columns of data to the CSV file output. This can be used when ACLs for selected users are to be
+replaced with a different user email address.
+
+* See: https://github.com/taers232c/GAMADV-XTD3/wiki/Users-Shared-Drives#bulk-change-user1-shared-drive-access-to-user2
+
 ### 6.79.08
 
 Clarified action to perform messages when creating/deleting/updating licenses.
diff --git a/docs/How-to-Upgrade-from-Standard-GAM.md b/docs/How-to-Upgrade-from-Standard-GAM.md
index d3ea9b68..f428f14b 100644
--- a/docs/How-to-Upgrade-from-Standard-GAM.md
+++ b/docs/How-to-Upgrade-from-Standard-GAM.md
@@ -251,7 +251,7 @@ writes the credentials into the file oauth2.txt.
 admin@server:/Users/admin$ rm -f /Users/admin/GAMConfig/oauth2.txt
 admin@server:/Users/admin$ gam version
 WARNING: Config File: /Users/admin/GAMConfig/gam.cfg, Section: DEFAULT, Item: oauth2_txt, Value: /Users/admin/GAMConfig/oauth2.txt, Not Found
-GAMADV-XTD3 6.79.08 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
+GAMADV-XTD3 6.79.09 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
 Ross Scroggs <ross.scroggs@gmail.com>
 Python 3.12.4 64-bit final
 MacOS Sonoma 14.5 x86_64
@@ -923,7 +923,7 @@ writes the credentials into the file oauth2.txt.
 C:\>del C:\GAMConfig\oauth2.txt
 C:\>gam version
 WARNING: Config File: C:\GAMConfig\gam.cfg, Section: DEFAULT, Item: oauth2_txt, Value: C:\GAMConfig\oauth2.txt, Not Found
-GAMADV-XTD3 6.79.08 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
+GAMADV-XTD3 6.79.09 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
 Ross Scroggs <ross.scroggs@gmail.com>
 Python 3.12.4 64-bit final
 Windows-10-10.0.17134 AMD64
diff --git a/docs/Users-Shared-Drives.md b/docs/Users-Shared-Drives.md
index b99746ac..4cd41e01 100644
--- a/docs/Users-Shared-Drives.md
+++ b/docs/Users-Shared-Drives.md
@@ -15,7 +15,8 @@
 - [Display Shared Drive access](#display-shared-drive-access)
   - [Display Shared Drive access for specific Shared Drives](#display-shared-drive-access-for-specific-shared-drives)
   - [Display Shared Drive access for selected Shared Drives](#display-shared-drive-access-for-selected-shared-drives)
-- [Change User1 Shared Drive access to User2](#change-user1-shared-drive-access-to-user2)
+- [Change single User1 Shared Drive access to User2](#change-single-user1-shared-drive-access-to-user2)
+- [Bulk change User1 Shared Drive access to User2](#bulk-change-user1-shared-drive-access-to-user2)
 - [Display empty folders on a Shared Drive](#display-empty-folders-on-a-shared-drive)
 - [Delete empty folders on a Shared Drive](#delete-empty-folders-on-a-shared-drive)
 - [Empty the trash on a Shared Drive](#empty-the-trash-on-a-shared-drive)
@@ -464,14 +465,27 @@ gam <UserTypeEntity> print emptydrivefolders [todrive <ToDriveAttribute>*]
         select <SharedDriveEntity>
 ```
 
-## Change User1 Shared Drive access to User2
+## Change single User1 Shared Drive access to User2
 ```
 # Get Shared Drives for User1
 gam redirect csv ./U1SharedDrives.csv user user1@domain.com print shareddriveacls pm emailaddress user1@domain.com em oneitemperrow
 # For each of those Shared Drives, delete User1 access
-gam redirect stdout ./DeleteU1SharedDriveAccess.txt multiprocess redirect stderr stdout gam delete drivefileacl "~id" "~permission.emailAddress"
+gam redirect stdout ./DeleteU1SharedDriveAccess.txt multiprocess redirect stderr stdout csv ./U1SharedDrives.csv gam delete drivefileacl "~id" "~permission.emailAddress"
 # For each of those Shared Drives, add User2 with the same role that User1 had
-gam redirect stdout ./AddU2SharedDriveAccess.txt multiprocess redirect stderr stdout gam create drivefileacl "~id" user user2@domain.com role "~permission.role"
+gam redirect stdout ./AddU2SharedDriveAccess.txt multiprocess redirect stderr stdout csv ./U1SharedDrives.csv gam create drivefileacl "~id" user user2@domain.com role "~permission.role"
+```
+
+## Bulk change User1 Shared Drive access to User2
+This requires GAM version 6.79.09 or higher.
+
+Make a CSV file Users.csv with two email address columns: User,Replace
+```
+# Get Shared Drives for all Users in CSV file
+gam redirect csv ./U1SharedDrives.csv multiprocess csv Users.csv gam user "~User" print shareddriveacls pm emailaddress "~User" em oneitemperrow addscvdata Replace "~Replace"
+# For each of those Shared Drives, delete User access
+gam redirect stdout ./DeleteU1SharedDriveAccess.txt multiprocess redirect stderr stdout csv ./U1SharedDrives.csv gam delete drivefileacl "~id" "~permission.emailAddress"
+# For each of those Shared Drives, add Replace with the same role that User had
+gam redirect stdout ./AddU2SharedDriveAccess.txt multiprocess redirect stderr stdout csv ./U1SharedDrives.csv gam create drivefileacl "~id" user "~Replace" role "~permission.role"
 ```
 
 ## Delete empty folders on a Shared Drive
diff --git a/docs/Version-and-Help.md b/docs/Version-and-Help.md
index 0f8dfac1..45310b4b 100644
--- a/docs/Version-and-Help.md
+++ b/docs/Version-and-Help.md
@@ -3,7 +3,7 @@
 Print the current version of Gam with details
 ```
 gam version
-GAMADV-XTD3 6.79.08 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
+GAMADV-XTD3 6.79.09 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
 Ross Scroggs <ross.scroggs@gmail.com>
 Python 3.12.4 64-bit final
 MacOS Sonoma 14.5 x86_64
@@ -15,7 +15,7 @@ Time: 2023-06-02T21:10:00-07:00
 Print the current version of Gam with details and time offset information
 ```
 gam version timeoffset
-GAMADV-XTD3 6.79.08 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
+GAMADV-XTD3 6.79.09 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
 Ross Scroggs <ross.scroggs@gmail.com>
 Python 3.12.4 64-bit final
 MacOS Sonoma 14.5 x86_64
@@ -27,7 +27,7 @@ Your system time differs from www.googleapis.com by less than 1 second
 Print the current version of Gam with extended details and SSL information
 ```
 gam version extended
-GAMADV-XTD3 6.79.08 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
+GAMADV-XTD3 6.79.09 - https://github.com/taers232c/GAMADV-XTD3 - pythonsource
 Ross Scroggs <ross.scroggs@gmail.com>
 Python 3.12.4 64-bit final
 MacOS Sonoma 14.5 x86_64
@@ -64,7 +64,7 @@ MacOS High Sierra 10.13.6 x86_64
 Path: /Users/Admin/bin/gamadv-xtd3
 Version Check:
   Current: 5.35.08
-   Latest: 6.79.08
+   Latest: 6.79.09
 echo $?
 1
 ```
@@ -72,7 +72,7 @@ echo $?
 Print the current version number without details
 ```
 gam version simple
-6.79.08
+6.79.09
 ```
 In Linux/MacOS you can do:
 ```
@@ -82,7 +82,7 @@ echo $VER
 Print the current version of Gam and address of this Wiki
 ```
 gam help
-GAM 6.79.08 - https://github.com/taers232c/GAMADV-XTD3
+GAM 6.79.09 - https://github.com/taers232c/GAMADV-XTD3
 Ross Scroggs <ross.scroggs@gmail.com>
 Python 3.12.4 64-bit final
 MacOS Sonoma 14.5 x86_64
diff --git a/src/GamCommands.txt b/src/GamCommands.txt
index 6c12e0b0..65b79f93 100644
--- a/src/GamCommands.txt
+++ b/src/GamCommands.txt
@@ -4928,6 +4928,7 @@ gam print teamdriveacls [todrive <ToDriveAttribute>*]
         [user|group <EmailAddress> [checkgroups]] (role|roles <SharedDriveACLRoleList>)*
         <PermissionMatch>* [<PermissionMatchAction>] [pmselect]
         [oneitemperrow] [<DrivePermissionsFieldName>*|(fields <DrivePermissionsFieldNameList>)]
+        (addcsvdata <FieldName> <String>)*
         [formatjson [quotechar <Character>]]
 gam show teamdriveacls
         [teamdriveadminquery|query <QueryTeamDrive>]
@@ -4957,6 +4958,7 @@ gam <UserTypeEntity> print teamdriveacls [todrive <ToDriveAttribute>*]
         <PermissionMatch>* [<PermissionMatchAction>] [pmselect]
         [oneitemperrow] [<DrivePermissionsFieldName>*|(fields <DrivePermissionsFieldNameList>)]
         [shownopermissionsdrives false|true|only]
+        (addcsvdata <FieldName> <String>)*
         [formatjson [quotechar <Character>]]
 gam <UserTypeEntity> show teamdriveacls
         [adminaccess|asadmin] [teamdriveadminquery|query <QueryTeamDrive>]
diff --git a/src/GamUpdate.txt b/src/GamUpdate.txt
index 1b0dc70d..f03020db 100644
--- a/src/GamUpdate.txt
+++ b/src/GamUpdate.txt
@@ -2,6 +2,14 @@
 
 Merged GAM-Team version
 
+6.79.09
+
+Added option `addcsvdata <FieldName> <String>` to `gam <UserTypeEntity> print teamdriveacls` that adds
+additional columns of data to the CSV file output. This can be used when ACLs for selected users are to be
+replaced with a different user email address.
+
+* See: https://github.com/taers232c/GAMADV-XTD3/wiki/Users-Shared-Drives#bulk-change-user1-shared-drive-access-to-user2
+
 6.79.08
 
 Clarified action to perform messages when creating/deleting/updating licenses.
@@ -285,7 +293,7 @@ and was `Waiting for N running processes to finish before terminating`.
 
 Fixed bug in `gam <UserTypeEntity> print messages ... positivecountsonly` where message counts with value 0 were deiplayed.
 
-Added option `addcsvdata <FieldName> <String>` to `gam <UserTypeEntity> print|messages` that adds
+Added option `addcsvdata <FieldName> <String>` to `gam <UserTypeEntity> print messages` that adds
 additional columns of data to the CSV file output.
 
 Added option `showusagebytes` to `gam <UserTypeEntity> print|show drivesettings` that displays
diff --git a/src/gam/__init__.py b/src/gam/__init__.py
index 16ee2353..ab48ee92 100755
--- a/src/gam/__init__.py
+++ b/src/gam/__init__.py
@@ -16854,7 +16854,7 @@ def doPrintShowDataTransfers():
       status = getChoice(DATA_TRANSFER_STATUS_MAP, mapChoice=True)
     elif myarg == 'delimiter':
       delimiter = getCharacter()
-    elif myarg == 'addcsvdata':
+    elif csvPF and myarg == 'addcsvdata':
       k = getString(Cmd.OB_STRING)
       addCSVData[k] = getString(Cmd.OB_STRING, minLen=0)
     else:
@@ -55134,7 +55134,6 @@ def _showComment(comment, stripPhotoLinks, timeObjects, i=0, count=0, FJQC=None)
 #	[showdeleted] [start <Date>|<Time>] [countsonly]
 #	[fields <CommentsFieldNameList>] [showphotolinks]
 #	[countsonly]
-#	(addcsvdata <FieldName> <String>)*
 #	[formatjson]
 # gam <UserTypeEntity> print filecomments <DriveFileEntity> [todrive <ToDriveAttribute>*]
 #	[showdeleted] [start <Date>|<Time>]
@@ -55180,7 +55179,7 @@ def printShowFileComments(users):
       stripPhotoLinks = False
     elif myarg == 'fields':
       _getCommentFields(fieldsList)
-    elif myarg == 'addcsvdata':
+    elif csvPF and myarg == 'addcsvdata':
       k = getString(Cmd.OB_STRING)
       addCSVData[k] = getString(Cmd.OB_STRING, minLen=0)
     elif myarg == 'countsonly':
@@ -64179,6 +64178,7 @@ SHOW_NO_PERMISSIONS_DRIVES_CHOICE_MAP = {
 #	[oneitemperrow] [maxitems <Integer>]
 #	[shownopermissionsdrives false|true|only]
 #	[<DrivePermissionsFieldName>*|(fields <DrivePermissionsFieldNameList>)]
+#	(addcsvdata <FieldName> <String>)*
 #	[formatjson [quotechar <Character>]]
 # gam [<UserTypeEntity>] show shareddriveacls
 #	[asadmin] [shareddriveadminquery|query <QuerySharedDrive>]
@@ -64210,6 +64210,7 @@ def printShowSharedDriveACLs(users, useDomainAdminAccess=False):
   cd = emailAddress = orgUnitId = query = matchPattern = permtype = None
   PM = PermissionMatch()
   maxItems = 0
+  addCSVData = {}
   while Cmd.ArgumentsRemaining():
     myarg = getArgument()
     if csvPF and myarg == 'todrive':
@@ -64248,6 +64249,9 @@ def printShowSharedDriveACLs(users, useDomainAdminAccess=False):
       pmselect = True
     elif myarg == 'shownopermissionsdrives':
       showNoPermissionsDrives = getChoice(SHOW_NO_PERMISSIONS_DRIVES_CHOICE_MAP, mapChoice=True)
+    elif csvPF and myarg == 'addcsvdata':
+      k = getString(Cmd.OB_STRING)
+      addCSVData[k] = getString(Cmd.OB_STRING, minLen=0)
     else:
       FJQC.GetFormatJSONQuoteChar(myarg, True)
   if query and not useDomainAdminAccess:
@@ -64279,6 +64283,11 @@ def printShowSharedDriveACLs(users, useDomainAdminAccess=False):
       groupsSet = {group['email'] for group in groups}
     else:
       checkGroups = False
+  if csvPF and addCSVData:
+    csvPF.AddTitles(sorted(addCSVData.keys()))
+    if FJQC.formatJSON:
+      csvPF.AddJSONTitles(sorted(addCSVData.keys()))
+      csvPF.MoveJSONTitlesToEnd(['JSON'])
   i, count, users = getEntityArgument(users)
   for user in users:
     i += 1
@@ -64388,6 +64397,8 @@ def printShowSharedDriveACLs(users, useDomainAdminAccess=False):
       if oneItemPerRow:
         for shareddrive in matchFeed:
           baserow = {'User': user, 'id': shareddrive['id'], 'name': shareddrive['name'], 'createdTime': shareddrive['createdTime']}
+          if addCSVData:
+            baserow.update(addCSVData)
           if shareddrive['permissions']:
             for permission in shareddrive['permissions']:
               _mapDrivePermissionNames(permission)
@@ -64407,6 +64418,8 @@ def printShowSharedDriveACLs(users, useDomainAdminAccess=False):
       else:
         for shareddrive in matchFeed:
           baserow = {'User': user, 'id': shareddrive['id'], 'name': shareddrive['name'], 'createdTime': shareddrive['createdTime']}
+          if addCSVData:
+            baserow.update(addCSVData)
           row = baserow.copy()
           if shareddrive['permissions']:
             for permission in shareddrive['permissions']:
@@ -69441,7 +69454,7 @@ def printShowMessagesThreads(users, entityType):
       dateHeaderConvertTimezone = getBoolean()
       if not dateHeaderFormat:
         dateHeaderFormat = RFC2822_TIME_FORMAT
-    elif myarg == 'addcsvdata':
+    elif csvPF and myarg == 'addcsvdata':
       k = getString(Cmd.OB_STRING)
       addCSVData[k] = getString(Cmd.OB_STRING, minLen=0)
     else:
@@ -70453,7 +70466,7 @@ def printShowForms(users):
     myarg = getArgument()
     if csvPF and myarg == 'todrive':
       csvPF.GetTodriveParameters()
-    elif myarg == 'addcsvdata':
+    elif csvPF and myarg == 'addcsvdata':
       k = getString(Cmd.OB_STRING)
       addCSVData[k] = getString(Cmd.OB_STRING, minLen=0)
     else:
@@ -70537,7 +70550,7 @@ def printShowFormResponses(users):
       frfilter = getString(Cmd.OB_STRING)
     elif myarg == 'countsonly':
       countsOnly = True
-    elif myarg == 'addcsvdata':
+    elif csvPF and myarg == 'addcsvdata':
       k = getString(Cmd.OB_STRING)
       addCSVData[k] = getString(Cmd.OB_STRING, minLen=0)
     else: