We have moved pilot users' mailboxes to Exchange Online. During the test, we found that on-prem user keeps on getting password prompt when try to open online mailbox user's calendar. The credential pop-up wouldn't go away even typing in the right password few times. The only way to solves this is recreate the on-prem user's Outlook profile.
As we are doing the migration in batch, it will be annoying to rebuild the Outlook profile for quite large amount of users, who used to open other's calendar to check the availability in Outlook.
Is there any solution for this or workaround? Your advice will be highly appreciated.