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Excel app starts very slow when not inside business network (Excel Addin with VSTO) RRS feed

  • Question

  • Hi@all

    We have a simple Excel-Addin, published with ClickOnce. When a user isn't inside our domain (eg working from home without VPN), Excel has 10-20 Seconds to open. When the user is connected via VPN, excel starts in 2 seconds.

    - VSTO Addin is made with Visual Studio 2019 and published via ClickOnce

    - I tried "load on demand" and "don't search for Updates" in the publish options. No difference.

    I expect Excel to boot fast, even no ClickOnce-Location is reachable...

    Wednesday, October 28, 2020 9:48 PM