Fix SCCM Untrusted Forest Remote DP Installation Error 0x800706BA ConfigMgr Endpoint Manager. This happens only in complex environments :). I’ve loads of remote DPs in untrusted forests. One of the remote DP installations was not going very well. DP was not getting installed at all.
Fix SCCM Untrusted Forest Remote DP Installation Error 0x800706BA
Checked and confirmed all the requirements like a) Require the Site server to Initiate Connection to this Site System b) Use another account for installing this site system (this account must have local admin rights on remote DP).
Following are the errors in distmgr.log:-
They were upgrading DP with ID 33554439. Thread 0x2490. Used 1 thread out of 5.
CWmi::Connect() failed to connect to \\[“Display=\\RemoteDP.com\”]MSWNET:[“SMS_SITE=RSP”]\\RemoteDP.com\\root\CIMv2. Error = 0x800706BA
DPConnection::ConnectWMI() – Failed to connect to RemoteDP.com.
Failed to install DP files on the remote DP. Error code = 1722
Fix Error 0x800706BA
The error 0x800706BA translates to “The RPC Server is unavailable.”
I tried remote WMI tests using wmimgmt.msc and wbemtest with no luck. Telnet was not working for remote DP IP for port 135 from the primary server. Port 135 is used for RPC services.
The cause of this problem was very simple. The RPC port 135 was not opened between the primary server and remote DP in an untrusted forest. We opened port 135, and remote DP got installed successfully.
More Details on SCCM Firewall ports – SCCM Firewall Ports Download The List Of ConfigMgr Firewall Ports HTMD Blog (anoopcnair.com)
Anoop C Nair is Microsoft MVP! He is a Device Management Admin with more than 20 years of experience (calculation done in 2021) in IT. He is Blogger, Speaker, and Local User Group HTMD Community leader. His main focus is on Device Management technologies like SCCM 2012, Current Branch, and Intune. He writes about ConfigMgr, Windows 11, Windows 10, Azure AD, Microsoft Intune, Windows 365, AVD, etc.