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Andy, Computer Consultant
Category: Computer
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Experience:  11yr exp, Comp Engg, Internet expert, Web developer, SEO
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What does Microsoft omsaddin mean? I am not able to get the

Customer Question

what does Microsoft omsaddin mean? I am not able to get the indexing to function
JA: Just to clarify, what's the exact model of your computer? And what operating system are you running?
Customer: hp probook 4540s Windows 10
JA: Have you installed any updates recently?
Customer: yes office 365
JA: Anything else you want the computer expert to know before I connect you?
Customer: no
Submitted: 11 months ago.
Category: Computer
Expert:  Russell H. replied 11 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

What indexing of what program is not working?

And, what is the full error message with 'omsaddin', please ?

Customer: replied 11 months ago.
the search option shows over 65,000 items to be indexed and the number has been the same for two days. I tried to do the addin for windows mail search.
to your question:
Outlook 2016
this is not an error message; it appears in the list of disabled items
Expert:  Russell H. replied 11 months ago.

Is 'omsaddin' perhaps an 'OMS Add-In' ?

Customer: replied 11 months ago.
why should it be disabled?
Customer: replied 11 months ago.
should I enable it?
Expert:  Russell H. replied 11 months ago.

An add-in, is generally an element or small program, that is added to a browser program.

But you are not using a browser, rather an install of Outlook 2016, correct?

Customer: replied 11 months ago.
Expert:  Russell H. replied 11 months ago.

OMS Add-On means, Outlook Mobile Service, and allows doing text messaging with MS Outlook.

Your problem has nothing to do with text messages. Or does it? let me know, I'm not sure, from here, yet.

Customer: replied 11 months ago.
it has nothing to do with the "index" function which is stuck on 65,457 items?
Customer: replied 11 months ago.
there is no problem with Text messages. should I have restarted the computer when I enabled the "addin for windows "search email..?
Expert:  Russell H. replied 11 months ago.

You might try enabling OMS Add-in. If your Outlook 2016 has any text message items, the indexing of them may be disabled if OMS Add-in is disabled.

Yes, try a restart of the computer.

Then re-join this session here:

and let me know the result, please, with regard to your problem. At least let me know if it has been solved!


Customer: replied 11 months ago.
I have rebooted;
I have tried enabling Microsoft Outlook Mobile Services" which results in a message that it either decreases the computer usage or causes Outlook to crash and automatically disables it as well as Windows Search Email Indexer'
if I connect you do you think you can fix this so I can see how it is done?
Customer: replied 11 months ago.
anyone there?
Expert:  Russell H. replied 11 months ago.

I am still here.

I don't know what to do to fix this problem; I have Opted Out, opening this case up to other Experts in this category.

Expert:  Jason Jones replied 11 months ago.

I am the person that will be helping you today.

May I start a secure remote assistance session with you so that I can better help you resolve this problem? When the remote session begins, a chat window will appear that we can use to communicate with each other.

Please, send your reply below in the box. After you type your message, click the Send button.

Thank you,