Outlook 365 add-in not visible in UI

Question

i have created new outlook addin using VS 2019 for Outlook365 desktop version.

when i run the project it, opens outlook but, i unable to see my outlook addin button, at the same time i put a test message in Startup, i could see this message but, i dont know why ADD-In button not visible in UI.

experts please help me.

thank you

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Thanks In Advance, Jeyaseelan

Answer 1

when i start run the project then i realized that, the error comes as

Retrieving the COM class factory for component with CLSID {0006F03A-0000-0000-C000-000000000046} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).

im using Microsoft.Office.Interop.Outlook version 15.0.0.0

from below line but, i dont know the reason...experts please advice

Private Sub ThisAddIn_Startup() Handles Me.Startup
        Try
            Dim Application As Microsoft.Office.Interop.Outlook.Application = New Microsoft.Office.Interop.Outlook.Application

************

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Thanks In Advance, Jeyaseelan