Transfer secondar calendar
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ZSAdmin Chirag H S
Jan 8, 2026, 7:11:13 AMJan 8
to GAM for Google Workspace
Issue with Transfer Secondary calendar
I'm using GAM 7.21.01Tried below commands:
gam user oldo...@domain.com transfer calendars newo...@domain.com c_8xx7c7cedb……@group.calendar.google.com
ERROR: 403: cannotModifyAclOfCalendarOwner - Cannot modify the ACL entry of a calendar data owner.
Tried this as well
gam user oldo...@domain.com transfer calendars newo...@domain.com c_aaa...@group.calendar.google.com removefromoldowner addtonewowner
Error: >removefromoldowner< command doesn't exist
Ross Scroggs
Jan 8, 2026, 12:32:29 PMJan 8
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I can duplicate, I'm researching the problem.
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Ross Scroggs
Jan 8, 2026, 12:54:06 PMJan 8
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Ross
On Jan 8, 2026, at 4:10 AM, 'ZSAdmin Chirag H S' via GAM for Google Workspace <google-ap...@googlegroups.com> wrote:
Ross Scroggs
Jan 8, 2026, 4:11:28 PMJan 8
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Ross
On Jan 8, 2026, at 4:10 AM, 'ZSAdmin Chirag H S' via GAM for Google Workspace <google-ap...@googlegroups.com> wrote:
ZSAdmin Chirag H S
Jan 9, 2026, 5:38:15 AMJan 9
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Thank you!
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Riccardo Pereira
Apr 21, 2026, 6:17:07 AMApr 21
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Hi Ross,
Is this likely to change - You can transfer ownership of calendars from one user to another; only non-primary calendars owned by the source user can be transferred.
This capability is no longer available, see: https://developers.google.com/workspace/calendar/release-notes#October_27_2025
Kind regards
Riccardo Pereira
Collaboration Tooling Engineer
FT Technology
Bracken House 1 Friday Street London EC4M 9BT
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Ross Scroggs
Apr 21, 2026, 9:28:41 AMApr 21
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No, API support is gone, the transfer must be done in the Calendar UI.
Ross
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Ben Davidson
May 14, 2026, 11:06:32 AM (4 days ago) May 14
to GAM for Google Workspace
Hi Ross,
Just to triple confirm, does this API change only apply to secondary calendars? Or is primary calendar transfer no longer API enabled?
Because primary calendar transfers are part of an off-boarding script that has been running for years, and from what I can see initially, it continues to work.
Thanks!
Ross Scroggs
May 14, 2026, 11:32:15 AM (4 days ago) May 14
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AFAIK, only seconday calendars are affected.
Ross
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Ben Davidson
May 14, 2026, 2:07:40 PM (4 days ago) May 14
to GAM for Google Workspace
Great, that's a relief.
Thank you, as always, Ross!
Tony Nelson
May 14, 2026, 2:13:27 PM (4 days ago) May 14
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piggy backing off of that, is it possible to transfer a primary calendar from a former user to a current user?
Thank you
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Ross Scroggs
May 14, 2026, 3:24:17 PM (4 days ago) May 14
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Tony/Ben,
If you then delete user1, the calendar goes away.
NOTE: For calendars, the behaviour is not sufficiently defined in the API documentation. Background transfers only transfer future non-private events with at least one guest/resource.
You can’t transfer your primary calendar, which is automatically assigned to you when you first sign in to Calendar.
Ross
On May 14, 2026, at 11:12 AM, Tony Nelson <tony....@howardschool.org> wrote:
piggy backing off of that, is it possible to transfer a primary calendar from a former user to a current user?
Thank you
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