Do the following:

• Run the Secure Mail Test troubleshooting tool that finds issues with Active Sync policy configurations. For details, see Secure Mail Test Application.
• Collect Exchange Server logs. For details, see the Microsoft documentation.
• Collect Secure Mail logs. In the Secure Mail logs, if you see the following messages, ensure that the uploadReadAhead size is set as recommended in IIS of the Exchange Server. For more information, refer to the FAQ section of the Secure Mail Test Application.

Received unexpected response of 413 for command Sync

Received erorrDomain=com.citrix.activesync.error and errorCode=5 during Sync

Sync did not take place or error detected during sync in push coordinator, resetting fla syncError= Error Domain=com.citrix.activesync.error Code=5 The operation couldn’t be c UserInfo=0x178f4f70 {X-Powered-By=ASP.NET

Additional Resources:

Full XenMobile Deployment Handbook

Other Troubleshooting Checklist Articles:

• Troubleshooting Checklist: Users cannot browse internal websites in Secure Web
• Troubleshooting Checklist: Exchange SSO is not working in Secure Notes for iOS, but does work in Secure Notes for Android.
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• Troubleshooting Checklist: In the ShareFile app, Secure Mail, or Secure Notes, the following error appears: "Your connection is unavailable. Only offline files can be accessed."
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• Troubleshooting Checklist: Cannot send emails using Secure Mail
• Troubleshooting Checklist: Users cannot access apps in Secure Hub
• Troubleshooting Checklist: Cannot enroll and authenticate a device using Secure Home
• Troubleshooting Checklist: Cannot get required apps on an iOS device