Seamless Microsoft 365 Migration with Apps4Rent

Good points raised here. DNS cutover timing and mailbox mapping are areas that genuinely need careful attention — even with solid planning, small oversights there can cause unnecessary disruption for end users.

One thing we learned from handling a few migrations is that the coexistence window is often underestimated. Keeping source and destination mailboxes in sync during that period, without creating duplicates or missing emails, requires more coordination than it looks on paper.

We came across EdbMails Office 365 Migration during one of our projects and found it useful, particularly for incremental migration during the coexistence phase and handling bulk mailboxes without much manual intervention. Nothing groundbreaking, but it did the job reliably without a lot of troubleshooting overhead.