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For resolution, see Microsoft Dynamics CRM for Outlook client crashes when using a Proxy PAC file. If the problem persists, contact your system administrator. Outlook synchronization is not supported if Cached Exchange Mode is turned off in Outlook.If the user domain account is in a domain different from the Dynamics 365 organization, the user will receive an error message (see below) when installing Dynamics 365 for Outlook. There is a problem communicating with the Microsoft Dynamics 365 server. See: Turn on Cached Exchange Mode Server-side synchronization is supported if Cached Exchange Mode is turned off in Outlook.How to troubleshoot scenarios when you are unable to open a file or folder or when a service on your computer fails to start on your computer.How to troubleshoot scenarios when you are unable to open a file or folder on a local drive on your computer.Anyway this is good to know in case you end up in a situation where you see Outlook 2007 and Outlook 2010 behavior is different when it comes to deployments where Exchange 2007 or 2010 uses self-signed certificates.
This can occur if the permissions on the service account that is used to start the service have been changed or does not have permissions to the Windows registry keys used by the service.Try disabling suspect add-ins to see if that resolves your issue.Dynamics 365 for Outlook might have authentication and connection issues when using a proxy PAC file configured in workstation browsers.However, you may want to verify that the activation is valid. In large environments with hundreds of contacts, it may be necessary to set conditions to limit the data that is to be synchronized to every salesperson who has a mailbox that is configured for Outlook synchronization.An example of when you may need to do this is when no Contacts or To-Dos are synchronized when Outlook Synchronization is run. If there are no conditions set for the contacts entities, then you may get a message to look at the debug log.