Teams Migration. ODM adds the migration service accounts as member or owner to Groups. Gets "Resource is temporarily unavailable. Retrying in 5 minutes...". Slows migration time drastically (4256911)

Teams Migration. ODM adds the migration service accounts as member or owner to Groups. Gets "Resource is temporarily unavailable. Retrying in 5 minutes...". Slows migration time drastically

we are seeing the event below. The Resource is temporarily unavailable whenever ODM (On Demand Migration) is trying to add the service account as owner or member to Groups. All those occurrences of waiting 5 minutes slows down the migration drastically.

Know that MS can take some time to sync this permission to the Team(s), especially if the Team(s) contains a private channel(s). These event messages and the extra time are expected behavior.

Adding the service account in advance would help speed up the migration. In other words, if you added the accounts as a member (source) or owner [target) to the Team before the ODM migration. That would get that out of the way beforehand and avoid all those 5-minute waits.