Are you planning your Azure SSO application migrations separately from your M365 workload cutover, or running them together?

I migrated Enterprise SSO configurations for over 20 applications between Azure tenants as part of the acquisition migration program. That’s not just an application list, for each has it’s application has its own redirect URIs, client secrets, conditional access policies, and group assignments that have to be rebuilt or migrated in the target tenant before users hit the new login endpoint.

If SSO migrations lag behind the M365 cutover, users authenticate into the new tenant and immediately get access failures on every federated application.

That’s not a help desk ticket. That’s a Sev 1 at 6 AM on Day One.

The sequencing I follow: target app registrations configured and tested in parallel during pre-cutover, with SSO switchover happening in the same maintenance window as the DNS cutover.

How are you sequencing SSO migration relative to your M365 workload cutover?

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