Hi,
1,Please check the distmgr.log for more details.
2,Please make sure the site server's computer account is member of the local admins on that DP.
3,Please check the firewall settings on the DP and also make sure name resolution is working fine.
Similar threads for your reference:
SMS_Distribution_Manager Errors
SMS_DISTRIBUTION_MANAGER issue
Thanks for your time. Have a nice day!
Best regards,
Simon
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