Use O365Synchronizer when Microsoft 365 contacts need to be synchronized into mailbox contact folders or represented as contacts across tenant boundaries.

The module is useful for GAL-to-personal-contact scenarios, organization contact synchronization, and controlled cleanup of previously synchronized personal contacts.

Common tasks

• Clear synchronized personal contacts from a test mailbox.
• Sync selected GAL contacts into a mailbox folder.
• Filter contacts by member type, group membership, or company name.
• Run the first pass with -WhatIf before changing contact data.