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Even with careful planning, issues may arise after Fasthosts to Office 365 Migration. Common problems include email delivery issues, calendar synchronization problems, and access problems.

• Email Delivery Issues: Check email flow, DNS records, and connector settings. Ensure proper authentication and authorization. Verify spam filters and safe sender lists.
• Calendar Synchronization: Verify calendar sharing permissions, free/busy information, and recurring meeting settings. Ensure proper delegation and synchronization between devices.
• Access Issues: Check user licenses, permissions, and authentication settings. Verify device compatibility and network connectivity.

If issues persist, consult Microsoft support or consider using a migration tool with built-in troubleshooting features. Regular monitoring and user feedback can help identify and resolve problems promptly.