Initial situation:

SEPPmail Microsoft Outlook COM-Add-In is installed on the MS Outlook Client. However, when opening a new email, no Buttons For Sending Emails can be seen.

 

Cause:

a)In this case, the SEPPmail Microsoft Outlook COM-Add-In is automatically deactivated by the MS Outlook client.
As a rule, this behaviour only occurs in terminal server environments operating under heavy load.

 

Individual remedy:

At this point, no solution can be implemented via the SEPPmail Microsoft Outlook COM-Add-In configuration, as the control is carried out via MS Outlook itself.
Instructions on how to prevent MS-Outlook from deactivating the SEPPmail Microsoft Outlook COM-Add-In can be found at
  Registry entries for VSTO add-ins

Support for keeping add-ins enabled

 

In detail, first the entries of SEPPmail Microsoft Outlook COM-Add-In must be removed via the registriation editor from

 

HKEY_USERS\..\Software\Microsoft\Office\16.0\Outlook\Resiliency\DisabledItems

 

and then the key

 

HKEY_USERS\..\Software\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList\SEPPmail.OutlookAddIn.AddinModule

 

must be created to prevent it from being deactivated again.

 

 

b)In the configuration of the logged-in user, it is specified that no Buttons For Sending Emails should be displayed.

 

Individual remedy:

Activate the corresponding buttons directly in the Registry or via the Add-In Administration.