Users being duplicated and giving a -1 at the end of the user name

[Chriskmpruitt]

We are seeing some users being duplicated and given a -1 at the end of there name.
Example
cpruitt01
cpruitt01-1
there are two accounts in our JSS now, but only one in AD and ASM

We have azure synced to ASM and ASM synced to our JSS. Before I opened a case, I just wanted to see if anyone else has seen this in the pass.

[cbrewer]

I've seen it. It's usually caused by a failure to match an ASM user with a Jamf user. What criteria are you using to match? How are your ASM users created? Automatically with a sync? Manually by logging into their federated Managed Apple ID for the first time?