Hi @Sbrikdk ,
Programs in Office 2013 and later versions provide add-in resiliency in that the apps will disable an add-in if it performs slowly.
For example, the startup metric measures the time required by each connected add-in during Outlook startup. Outlook then computes the median startup time over 5 successive iterations. If the median startup time exceeds 1000 milliseconds (1 second), then Outlook disables the add-in and displays a notification to the user that an add-in has been disabled. The user has the option of always enabling the add-in, in which case Outlook will not disable the add-in even if the add-in exceeds the 1000 millisecond performance threshold.
*(Important: Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur. *)
You can always enable this add-in through the registry:
Key: HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\<application>\Resiliency\DoNotDisableAddinList
DWORD: < ProgID of the add-in>
Value:1
More information, see: Add-ins are user re-enabled after being disabled by Office programs
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