During database upgrade checklist I was failed to connect
with source database. I followed the suggested steps from upgrade guide as
pasted below but these weren't enough in my case for successful connection.
Configure matching user permissions
Windows integrated security is used to connect to the source
database from the target system. If the administrative user who is performing
the upgrade on the target system does not have access to the source system
database, the source system will reject the database connection. Open Microsoft
SQL Server Management Studio on the source system and perform the following
steps:
1. Grant Microsoft Dynamics AX database access to a domain user
with administrative privileges on the target Microsoft Dynamics AX 2012 system.
2. Add the user to the db_owner and public roles.
SOLUTION:
Make sure you have assigned sysadmin role to the AOS service account from SQL management
studio under this path SQLSERVERINSTANCE\Security\Logins\<AOSService
Account>. Right click on AOSService account and choose Server Roles from
left hand side panel and assign sysadmin role listed on right hand side.
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