Microsoft 365 Administration & Troubleshooting

Practical Microsoft 365 administration notes covering hybrid Exchange, mailboxes, automatic replies, Outlook-related incidents and user support. The guides are written as operational references for administrators and support engineers.

Practical guides

• Cannot access DirSync service
• Create Mailbox \ Shared Mailbox in Hybrid environment
• Install Office 365 on a computer
• Meeting Invitation recurring
• Personal Contacts Disappeared from outlook, phone, etc
• Set Custom Autoreply message for mailbox valid for number of days
• User cannot receive emails from external addresses

Using these guides

Test changes before production use, use least-privilege permissions, and verify version-specific steps against current vendor documentation when the interface or product has changed.