Overview
First steps
Frequently Asked Questions
Supported platforms and requirements
Installation
Migration walkthrough
How to
Migration types
Troubleshooting
Understanding the program
Monitoring and diagnostics
Licensing
Knowledge Base
Feedback

This manual refers to an old version of CodeTwo Office 365 Migration. Go here if you use the latest version.

This version of the program uses EWS to connect to Office 365 (Exchange Online). To continue using the program, make sure EWS is enabled in your tenant and the CodeTwo migration app is included in your EWSAllowedAppIDs list. See this article for instructions

Troubleshooting

The most common errors that you might encounter when using CodeTwo Office 365 Migration depend on your connection method. Use the links below to learn more.

Troubleshooting EWS connectivity (Exchange Server & Office 365)
Troubleshooting MAPI connectivity (Exchange Server)
Troubleshooting IMAP connectivity

We recommend that you also read our Knowledge Base article about troubleshooting the migration software.

In the case you stumble upon a problem that is not described in the sections linked above, please see our Knowledge Base. If this still doesn't solve your issue, contact CodeTwo Support, providing software's diagnostic files.