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Title
ERROR: "Unable to open target mail store" - Mailbox permission propagation delay in Office 365 -
Description
Migrator for Notes to Exchange (MNE) applies the necessary rights to the Office 365 migration admin account (or Admin Pool account) at the time of migration. Some customers have reported delays of 15-20 minutes when applying mailbox permissions to users in their Office 365 tenant. In this scenario, the migration may fail with an error in the log file indicating that MNE was unable to open the target mail store, because the migration admin user did not yet have the rights necessary to access the user's mailbox.
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