exchange hybrid migration issue


Hi everyone,


I already migrated mailbox from exchange on-premise to exchange online. Which it already successfully completed. But for 2 - 3 days, the mailbox doesn't appear in the exchange online mailbox, it appears on contact instead.

So, I work around migrating it back to exchange online and I found that I have an issue with the certificate expired then I cannot do the workaround.


Have anyone has encountered this issue? 

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