If you are treating a BitTitan migration as one big cutover for every user at the same time, consider whether a wave-based rollout is the better fit.

For large user populations, BitTitan migration programs typically run more smoothly when users are moved in planned waves rather than as a single event. Migrating smaller groups across multiple maintenance windows limits how many people are impacted per cutover and helps keep post-cutover Hyper Care from becoming unmanageable.

Common wave criteria in BitTitan migration programs include: geography, moving everyone in one office together so local IT support can align coverage; business unit, cutting over self-contained departments together to reduce disruption from cross-team dependencies; and mailbox size, starting with smaller mailboxes to confirm configuration and establish migration velocity before committing larger mailboxes.

The main tradeoff is coexistence. While some users are already in the destination tenant and others remain in the source tenant, cross-tenant meeting and calendar dependencies can surface. Without coexistence federation, users who have cut over will not be able to view free or busy details for users still in the source tenant. Wave order should reflect which groups have the most cross-team meeting dependencies.

Have you set clear BitTitan migration wave criteria and evaluated the coexistence impact between wave populations?

#BitTitan #MigrationWiz