Fix: LSA is Unable to Obtain an RPC Connection

Adding a forwarder to the domain should fix this

5 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

Share this article

Improve this guide

Read our disclosure page to find out how can you help Windows Report sustain the editorial teamRead more

Key notes

Connecting and establishing trust between two Domain Controllers is a popular practice. However, some users are reporting a Local Service Authority is unable to obtain an RPC connection error after entering the Domain FQDN or NetBIOS name.

While this issue can be pretty annoying, it is not the most difficult to fix, as it only requires minor tweaks most times. In this guide, we will show you the steps to follow to fix this issue and establish trust relationships between your servers.

Why is Local Security Authority unable to obtain an RPC connection?

Below are some of the potential causes that can cause LSA to be unable to obtain an RPC connection:

Now that we know what can cause this issue, let’s fix it by using the solutions below.

What do I do if LSA is unable to obtain an RPC connection error?

Before delving into the fixes in this section, try the following troubleshooting steps:

If this does not work, proceed to the solutions below:

1. Disable the firewall temporarily

If the firewall on either of the servers or DCs is active, it might be stopping you from creating trust relationships. This leads to the Local Security Authority is unable to obtain an RPC connection error.

The solution to this is to disable the firewall temporarily and retry the connection.

2. Add a forwarder

According to some users, you can eliminate the Local Security Authority is unable to obtain an RPC connection error by adding a forwarder IP address to your connection.

3. Try net use

4. Uninstall the Shared folder on VMware

If you are getting the Local Security Authority is unable to obtain an RPC connection error while trying to establish trust between your Domain Controllers, it might be due to the Shared Folders feature of VMware.

Note that the steps above are for uninstalling the feature on Windows 2003, which is the common version users face this error.

There you have everything you need to get rid of the Local Security Authority is unable to obtain an RPC connection while trying to establish trust between your Domain Controllers. You should now be able to fix this issue provided you follow the steps above.

If you are dealing with a similar error inLocal Security Authority cannot be contacted, check our detailed guide to fix it.

Feel free to let us know the solution that helped you fix this issue in the comments below.

Fix: LSA is Unable to Obtain an RPC Connection#

Why is Local Security Authority unable to obtain an RPC connection?#

What do I do if LSA is unable to obtain an RPC connection error?#

1. Disable the firewall temporarily#

2. Add a forwarder#

3. Try net use#

4. Uninstall the Shared folder on VMware#