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Should I preserve a CRM user to integration connector ?
If i use the CRM user admin role to integrate NAV to CRM , can I have problems with the synchronization jobs ?
Can I update a record in CRM with the admin user then update it in NAV within the connector ?
I'm on NAV2016, but I think the connector is essentially the same.
You must use a user with a license that allows it to modify data. The user admin role is not sufficient.
"Can I update a record in CRM with the admin user then update it in NAV within the connector ?"
No. You should NOT use this user to do other tasks in CRM. The NAV synchronization jobs consider all modifications made by this user in CRM to have been done by the NAV to CRM integration and so if you use this user to make other modifications in CRM, the connector will not bring those changes to NAV.
its defend on permission based ,
no need of giving total admin privileges
the problem is that I don't have enough users licences and i have to use a user that have already been created .
It's okay to use one that's already created. Just don't use that user to update any records in CRM--unless it is a NAV sync job performing the data modifications.