Hi,
We migrated some shared mailboxes from on-premises together with dir sync'ing. We realised we have to create some extra groups for the permissions of each shared mailbox, and that those groups had to be of type MailEnabledSecurity.
We have assigned the group to the shared mailbox with full access (Add-MailboxPermission), and also added the group to the Send As permissions for the shared mailbox(Add-RecipientPermission), but a user which is confirmed in that group (Get-MsolGroup, Get-MsolGroupMember) cannot open the mailbox.
However if we explicitly assign that user directly to the mailbox, as opposed to the group then it works OK.
Why are the groups not propagating? I thought there might be a delay but if the user change was quick then group change should be as quick?
We simply cannot add every single user to the mailbox, that would be crazy, can you help us?
Thanks,
Ross
