The VSTO add-on takes about 2.5 minutes to start if there’s no Internet connection

Kseni Kseni 1 Reputation point
2021-07-29T13:42:30.673+00:00

Dear colleagues! We need a recommendation to solve a problem associated with the long opening of MS Word through the add-in in the absence of the Internet.

Description:
The VSTO add-on takes about 2.5 minutes to start if there’s no Internet connection

The add-in is signed with a Symantec certificate. .net 4.5.2 is used here.

Why does it happen: WORD MS directs requests to certification authorities to find a list of revoked certificates.

The requests go to servers:
.symcd.com
.symcb.com
ctldl.windowsupdate.com

It proceeds 5 requests for 30 seconds in total. The customer's gateway blocks the Internet and, in fact, the request falls off after 30 seconds of proceeding. The customer cannot change the logic of the gateway. Disabling of the search for revoked certificates usually helps on Win 7.
On Win10 this setting doesn't help. Thanks in advance for the recommendations!

Office Development
Office Development
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Development: The process of researching, productizing, and refining new or existing technologies.
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