Outlook add-in command button does not work in windows client

Question

Outlook add-in command button does not work in windows client

Andy 苏 1

I developed an Outlook addin with a command button which works in outlook web, works in both IE and Chrome.

But in outlook windows client it only display a message "working on your request" and then an error "we're sorry, we couldn't access..." after processing for a while.

The addin command button manifest is as below.

<Control id="msgComposeSignout" xsi:type="Button">
<Label resid="FunctionButton.Label_1_3"/>
<Supertip>
<Title resid="FunctionButton.Title_1_3"/>
<Description resid="FunctionButton.Description_1_3"/>
</Supertip>
<Icon>
<bt:Image resid="Icon.16x16" size="16"/>
<bt:Image resid="Icon.32x32" size="32"/>
<bt:Image resid="Icon.80x80" size="80"/>
</Icon>
<Action xsi:type="ExecuteFunction">
<FunctionName>signOut</FunctionName>
</Action>
</Control>

My outlook client version is "Microsoft Outlook for Microsoft 365 MSO (16.0.13029.20232) 32-bit".

Kindly suggest.

JeffYang-MSFT 6,261 Reputation points Moderator

2020-09-03T08:52:52.153+00:00

Hi anonymous user-9642,
Does this issue only occur in this specific Outlook client? To further confirm if your issue is related your Outlook client or develop code, please try to add the same add-in to other different versions of Outlook client to see if the issue has any difference.

Besides, since here we mainly focus on general issues about Outlook desktop client and we may know little about Outlook develop. I researched a lot and found some tutorials about Build Outlook add-in on our own, please check them and see if they could help.
Build your first Outlook add-in
Tutorial: Build a message compose Outlook add-in

Any update, please feel free to post back.
JeffYang-MSFT 6,261 Reputation points Moderator

2020-09-06T03:29:31.707+00:00

Just checking in to see if above information was helpful. If you have any further updates on this issue, please feel free to post back.
JeffYang-MSFT 6,261 Reputation points Moderator

2020-09-23T03:33:27.553+00:00

Hi anonymous user-9642,
It has been a while, how is everything going?
Have you got your issue fixed?
If you still need more information, it is also suggested to post a new thread in the dedicated Outlook developer forum over here: https://social.msdn.microsoft.com/Forums/office/en-US/home?forum=outlookdev