Office 365 add-ins ribbon bar buttons are disabled - vsto

To isolate issue I created an empty add-in express project (Regions for Outlook and VSTO) as follows:
outlook 2013/2016 vsto project
added adx region for outlook and VSTO
explorer layout: taskpanedock.right
explorer item types: checked MailItem
no inspector selected (just explorer)
click new mail - all installed office 365 add-ins ribbon bar buttons are disabled (ie. evernote, findtime, etc)
tested with outlook 2016 connected to office 365 account

Related

How to prevent a VSTO Office Add-In from automatically getting disabled?

We run some custom add-ins in Outlook application and occasionally find that the Outlook application disables them; I then have to manually go to the application settings and re-enable them on each users PC. We are running Microsoft Office 365 click to run applications. I have tried the following but nothing seem to work 100% of the time.
I have tried setting the "AddinList/ProgID" REG key to 1 (always enabled) as described here - https://learn.microsoft.com/en-us/office/vba/outlook/concepts/getting-started/support-for-keeping-add-ins-enabled.
I have also tried setting a number of registry key combinations as described here - https://www.konnectemail.com/prevent-outlook-add-in-from-getting-disabled
Is there a specific way to tell the office application to NEVER disable a particular add-in regardless of the Office version?

Outlook web add-ins randomly disappearing from ribbon

We have encountered a very curious issue where Outlook web add-ins randomly disappear from the ribbon. The issue seems to be only reproducible in Office365 MSO 16.0.10827.20118 (32 bit).

harmon.ie and Visio 2013 license error

I have outlook 2016 with MS Vision 2013 installed. When I try to open MS visio file from Harmon.ie, I get License error message.
Error:
Microsoft Office cannot verify the license for this product. You should repair the office program by using control panel.
I can open the MS same MS Visio drawing manually or from sharepoint with no problem.
This error message could not be directly related to harmon.ie. You need to reach out to Microsoft about it. You should reproduce it out of harmon.ie.
Indeed, when user clicks on a document - harmon.ie (as a client application versus web interface) determines appropriate application based on the document extension and then launches the associated desktop application by passing it the URL to the document. Running the application from command line and passing it the direct URL of the Visio document duplicates the behavior of opening the document via harmon.ie. You can get the url to your Visio document by right clicking on it from our sidebar, and select copy address.
Please check again to see if running MS Visio, from command line and providing the URL to the SharePoint document would reproduce the issue:
-Open a cmd window
-Sample command format is below
"Path_to_Visio\visio_exe.exe" "urlof_document/document.visio_extension”
----- Jean

Message Compose Outlook add-in is not activated in Outlook 2016 desktop

I developed an add-in with a MessageComposeCommandSurface extension point.
It appears, is activated and works on outlook.office.com but with windows desktop client, Outlook 2016 (version 16.0.8625.2121), the button appears in compose mode but stays gray and it is not clickable.
I tested the command-demo-addin mentioned in Microsoft Docs and published on Github with the same result. Similarly, as shown on screenshot, it is impossible to click and launch the add-in which seems unactivated.
The COMPOSE buttons are disabled in the following instances:
1) The Item is in a public folder.
2) The Item is in Junk, Outbox (not drafts), or Sync Issues.
3) The item is "secure". DRM, or S-MIME encrypted. (older versions of Outlook also do not support S-MIME signed)
4) Outlook is offline.
In the situation where Read Mode add-ins are working, but Compose does NOT it is almost always #3. Usually the user will have on the option to always DRM / S-MIME their outgoing messages.
Update with image of security settings:
If Com Add-ins load a Custom Form this can also affect add-ins:
Checking Com Add-ins:
Note that outlook actually ships with some add-ins and a lot of com-addins work fine with Web Add-ins. It's only when Com Add-ins override the default new mail form (or other forms) that they can interfere with Web Add-ins.
Some COM add-ins will NOT use Custom Form, but will access the parent folder (item.Parent) and there is currently a bug that disable's Web Add-ins when a COM Add-in or VBA script does this.
File->Options->Add-Ins-> "Go" (next to manage add-ins)
If you have an antivirus instaled like avast, try to disable the addin of this and then try to open your compose mail window.

How create a custom windows form to manage Outlook Calenar

How create a small program where I can schedule my activities and update my Microsoft Outlook Calendar (Microsoft 2003 up to now versions).
Not a plugin of outlook , looking for windows form
You can automate Outlook from any application. See How to automate Outlook by using Visual Basic for more information.
Also you may find the following links helpful:
Automating Outlook from a Visual Basic Application
Starting an Outlook Automation Session
VB app automates Outlook (VBAutomateOutlook)