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M365 only admin locked out MFA error 53003
I am learning this the hard way....so here it goes. Currently I am locked out of as the only admin on the tenant with error 53003. I was updating some Microsoft MFA default policy settings in En...
Error 53003 means a Conditional Access policy is blocking the sign-in. Since you're the only admin, this is a rough spot to be in. Try signing in from https://aka.ms/intuneeducation or directly at https://admin.microsoft.com - sometimes different portals hit different CA policies. If that doesn't work, you might need to contact Microsoft support. For the future, always have a break-glass account that's excluded from all CA policies.