Names of Outlook contacts spontaneously changing

[jmt356]

I use Exchange to manage my contacts.

I have a series of contacts in Outlook named in the following pattern, where the first contact contains generic information about a contact and the others have specific information:

London
London - galleries
London - hotels
London - restaurants
London - transportation

I recently found that “London” was renamed to “London - galleries,” such that I had two “London - galleries” contacts. I did not make the change.

Similarly, I have series of contacts as follows:

Post Office
Post Office - fees
Post Office - hours
Post Office - ombdudsman

I recently found that “Post Office” was renamed to “Post Office - hours,” such that I had two “Post Office - hours” contacts. Again, I did not make this change.

This occurrence occurs relatively frequently, whenever I have a series of contacts, with the first contact being a generic one that is followed by contacts with more specific information.

What could be causing these changes and how do I stop it?

[JoeP]

After the contacts are renamed are they exact duplicates?

[jmt356]

After the contacts are renamed are they exact duplicates?

No; the contents of each contact do not change. Only the name of the root contact is changed (for example, "London" might be changed to "London - galleries."

In addition, the formatting of the notes section of the root contact is sometimes modified, but the actual content of the text is not changed.

[jmt356]

After the contacts are renamed are they exact duplicates?

No; the contents of each contact do not change. Only the name of the root contact is changed (for example, "London" might be changed to "London - galleries."

In addition, the formatting of the notes section of the root contact is sometimes modified (plain text is put into styles), but the actual content of the text is not changed.

[JoeP]

Do you have any add-ins running in Outlook that may access contacts?
Do you sync contacts with any other services or devices?

[jmt356]

I have a Zoom and Teams add-in, but I don't think they can access my contacts.

I sync contacts with my phone. That might be responsible for the changes to the contacts.

I tried following the suggestion at https://answers.microsoft.com/en-us/out ... 7d64fead70 and will continue to monitor this issue.