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Frequently Asked Questions for integrating with Microsoft 365 for the web
Technical/implementation questions
- Why does Microsoft 365 for the web pass the access token in both the Authorization HTTP header and as a URL parameter?
- What's the maximum length of a WOPI access token?
- Microsoft 365 for the web sometimes sends the access token in the query string when making requests to the service. Is this a problem?
- How do I find the right URLs for the Microsoft 365 for the web applications?
- What authentication providers does Microsoft 365 for the web support?
- What browsers does Microsoft 365 for the web support?
- Why should I avoid using the CloseButtonClosesWindow property in Microsoft 365 for the web?
- How does Microsoft 365 for the web determine which datacenter to route a given user to?
- Can auto-save be disabled in Microsoft 365 for the web?
- How often should WOPI discovery be run?
- If I make an edit and immediately close the application, occasionally my edit is lost - why?
- How does a WOPI host know when an editing session is finished?
- What are the file sizes supported by Microsoft 365 for the web?
- What are the IP ranges and ports used by Microsoft 365 for the web?
- What languages does Microsoft 365 for the web support?
- Why do I get an error when I try to view PDF documents in Microsoft 365 for the web?
- How should users give feedback to Microsoft regarding Microsoft 365 for the web?
Administrative questions
- Can I add new domains to the WOPI domain allow list after launch?
- Can I add more than one domain to the WOPI domain allow list?
- What happens our company has been bought out by another company?
- How long will the verification or reverification process take?
- What do I need to provide for verification or reverification testing?
- What happens if we don't respond or fix the identified issues?
- What if I need extra time for test reverification, what should I do?
- Can we use the same test accounts?
Frequently Asked Questions for integrating with Microsoft 365 for mobile
- Why does calling the Token Issuance URL return The request was aborted: Could not create SSL/TLS secure channel?
- I have already integrated my app with Microsoft 365 for the web. What additional work is there to integrate with Microsoft 365 for mobile?
- What file types are supported in Microsoft 365 for mobile?