Thus, to disable running Outlook in the offline mode, you just have to close Lync / Skype4B (make sure that there are no processes in the Task Manager) and disable Work Offline mode in Outlook.Īfter that you can run your Lync (Skype4B). As it turned out, if Lync and Outlook are started at the same time, changing Offline mode is not saved after Outlook is closed (Lync somehow blocks saving offline mode settings, maybe, due to its constant connection to Exchange). The solution was unexpected: all users who reported Outlook start offline problem had Skype for Business (Lync) installed. We reinstalled and repaired Outlook – nothing helped.
The following sidebar ( Outlook Cached Exchange Mode ) shows how to find if Outlook cached Exchange Mode is enabled. We tried to delete an Outlook profile and re-create it again. The offline synchronizing limitation using Outlook 2013 does not affect the following items: offline storage table (OST) or Offline Outlook Data File is very similar to the PST or Outlook Data File.We started Outlook in the Safe Mode ( outlook.exe /safe command) and disabled all Outlook add-ons: the problem persisted.Under Offline Settings, check Use Cached Exchange Mode. Click the Exchange or Microsoft 365, and then click Change. Turn Cached Exchange Mode on or off Click File > Account Settings > Account Settings. In Exchange 2013/2016, the main protocol for connecting Outlook clients to CAS is HTTPS ( MAPI over HTTP), so it suffices to check the availability of port TCP/443 accounts default to Cached Exchange Mode and cannot be changed. You can do it using the Test-NetConnection cmdlet: tnc ber-msgcas –port 135 – the port is available. In Exchange 2010, you need to check the CAS server availability from the user computer thought port TCP/135 (RPC locator).The accessibility of a mailbox through the OWA interface: the mailbox was available.To disable Cached Exchange Mode, repeat the steps but uncheck "Use Cached Exchange Mode". A possible reason is a corrupted local e-mail cache. Sometimes, Outlook can’t properly display the received emails or can’t find them. The default setting is 12 months - change this to your preference. If we disable this cache mode, Outlook will have no email without a direct connection with the Exchange server. Select the box for Use Cached Exchange Mode.Choose File | Account Settings | Account Settings.If you have Cached Exchange Mode disabled for some reason, you can enable it by following the steps below: Hi, In theory, when the listed GPO settings are applied.These are the GPO settings that I have disabled: Cached. I have MS office 2016 ADMX template in my GPO. All the users are onsite and for security reasons I want to disable Cached Mode in Outlook 2016. Use of Cached Exchange Mode shields the user from network and server connection issues and facilitates switching from online to offline for mobile users.Ĭached Exchange Mode is enabled by default when you configure an Office365 account and is also highly recommended. Hi, I just upgraded from Exchange 2010 to Exchange 2013 and Outlook 2010 to Outlook 2016. Most users will find that Cached Exchange Mode performs faster than online mode. Access to all data is not available until the initial synchronization is complete. Exit and then restart Microsoft Outlook 2010. Under Microsoft Exchange server, select or clear the Use Cached Exchange Mode check box.
On the E-mail tab, click the Exchange account, and then click Change. Note: the time required to complete the initial synchronization will depend on the size of your mailbox. Click Account Settings, and then click Account Settings. Attachments froze Outlook/went to not responding until they got done uploading. The benefits of enabling this is reducing network traffic, faster responds time of the Outlook client (especially with large attachments), being able to use the Junk E-mail Filter and being able to work off-line. If makes a local copy of the Exchange Mailbox. Office 365 is a pig with cached mode off, even with a strong internet connection and machine. Cached Exchange Mode is new in Outlook 2003. This copy provides quick access to your data and is frequently updated with the mail server. If using on prem exchange and the user has a laptop, or if using Office 365 with either desktop or laptop - cached mode on. A copy of your mailbox and GAL (Global Address List) is cached on your computer. Cached Exchange Mode can provide you with a better experience when you use Outlook.