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I am trying to merge two accounts and I am getting this error 'System user with id =00000000-0000-0000-0000000000 does not exist'.
Does anyone know what might be the issue?
I am using dynamics 365 on-prem version 8.2
Do you have any plugins on Account update / status change events?
Last week a few things were pushed to live system including plugins and web resource. I am not sure if a plugin is running on accounts or which entity. But that might explain everything because I was able to merge without issues before the changes.
Did you check if the owners of the 2 account records are active CRM users?
Yes they are
And what about the related contacts and activities?
According to the Relationship behavior, all related records will be merged as well.
Cascade all to all contacts and activities when merging.
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