Server Side Integration Outlook add-in is Grayed out in Outlook as below
Outlook 2016, Outlook 2013, Outlook 2010.
Reproducing the Issue
Start the Outlook client you observe that server side add-in is grayed out with respective solutions.
Below are possible cases where Server Side add-in is grayed out.
Add-In button can be grayed out when there is no e-mail selection(empty folder for example).
This is expected behavior of Add in, kindly make sure that you have selected at least one e-mail to activate the Add-In.
- Make sure the add-in is installed by verifying its status in C4C.
- Go to e-mail Integration.
- In the Groupware Settings, select User.
- Find the affected user and press the gear icon on the top right.
- Press Check add-in status. Result should be as below.
Add-In Status was checked for
If above status are not observed, kindly reach system admin to correct these errors.
Sometimes changes to add-in commands, such as the icon for a ribbon button or the text of a menu item do not seem to take effect.
Clear the Office cache of the old versions. Delete the content of folder %LocalAppData%\Microsoft\Office\15.0\WEF (for Office 2016 it would be 16.0) and restart Outlook.
Logon to the OWA Exchange server or open the Office 365 account in a Web browser. Make sure the add-in is loading successfully. If add-in works in OWA, but doesn't load in Outlook - check the current Outlook version and make sure that the most recent updates are installed.
Refer to additional information on Microsoft page about versions http://social.technet.microsoft.com/wiki/contents/articles/31133.outlook-and-outlook-for-mac-update-file-versions.aspx#A
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