Forum Discussion
Failed IMAP Migration on Office365
I am having the following error while establishing a IMAP Migration Job from MDaemon to Office365 Error: TooManyTransientFailureRetriesPermanentException: The job encountered too many transient f...
Are you using the user credentials or the admin account? If you are using admin account, you need to ensure your have full mailbox permission in source messaging system as well to read and copy the data from the mailbox. Refer section "Internet Message Access Protocol 4 (IMAP4) migration" from https://docs.microsoft.com/en-us/exchange/mailbox-migration/assign-permissions-for-migration