OpenDataSource method or property issue, Office 2016

"an error occurred merging data. the opendatasource method or property is not available because this command is not available for reading."

One of our users is experiencing this message when attempting to send a confirmation email from our primary software platform. I have unchecked the setting in Word that apparently is the typical cause of this error, as well as uninstalling and reinstalling office.

What is really strange is that this only occurs for a single user, when you sign in with another user on the same workstation this issue doesn't occur.

Any ideas would be appreciated.
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Tyler BrooksNetwork and Security ConsultantAsked:
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*** Hopeleonie ***IT ManagerCommented:
This is for Office 2013 but did you try this?

Go to File > Options > General and see if there is a check in the box:

"Open e-mail attachments and other uneditable files in reading view"

If there is, remove it please.
Tyler BrooksNetwork and Security ConsultantAuthor Commented:
That was the first thing I tried, however it doesn't resolve the issue.
*** Hopeleonie ***IT ManagerCommented:
You told that this happens only for one user. Correct? And all users have the same Software (OS, Office, primary software platform etc.) ?
Tyler BrooksNetwork and Security ConsultantAuthor Commented:
Yes, even on the same workstation if you sign in with a different user account the merging will work correctly.
*** Hopeleonie ***IT ManagerCommented:
Looks like the User profile is corrupted.
I would create a new user profile for that user.

Note: First try if you still get the Word error before copying the old files.

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