Revit Server 2026 Permission Folder

[augusto.rubio]

Hi, I just install on my server Revit Server 2026 like I install the 2022,2023,2024,2025. But the 2026 show a error in save the model on the server. I ajust the folder permission like another servers but 2026 not its working.

As I have multiples Revit Servers in one machine I split the folders. The folder 2026 permissions and the log they are in attachments.

Any one can help me to solver this problem ?

[Basam.Yousif]

Is your OS and .NET all up to date? .Net core up to date, as required by all 2026 software?

Is your disk full?

[augusto.rubio]

Hi, the system its up date. Its a Windows Server 2022 Standard, version 21H2.

The system have 460GB and use 40GB.

Do you know about any new pre requisit the .NET or another service?
The wiki of Autodesk not comment any modification about the instalation instructions in the Revit Server 2026.

[Basam.Yousif · Accepted solution]

I think you should escalate to Autodesk.

Login to manage.autodesk.com then click on the little icon on the bottom right to get started. You will have to get past a few AI questions before you get to 'Open a case'

[augusto.rubio]

I will try this, thanks.

[Basam.Yousif]

How did it go? were they able to help?

Can you share more info about the cause of the error?

[augusto.rubio]

Hi Basam,

A tech support Autodesk solved the case. The main problem has related inside of the file config "ModelService" in ProgramData. When us install Revit Server 2026, the path of "TempRepository" not update to the main folder of Projects and Cache. This problem causes the error of permission denied inside the project folder. 

He solved this case, creating the folder "TempRepository" inside the main folder together the folders Projects and Cache and updating the path inside the config file in ProgramData/Autodesk/RevitServer2026/ModelService.

[honzinYFSLZ]

This solution didn’t work for me. I couldn't find the configuration file config in the path ProgramData/Autodesk/RevitServer2026/ModelService. If I leave the default path C:\ProgramData\Autodesk\Revit Server 2026 during installation, everything works without any issues. However, if I specify a custom path and create a TempRepository, it throws a write error. The folder permissions are the same.

[honzinYFSLZ]

I temporarily resolved the issue by keeping the default installation path and redirecting the Project and Cache directories to the new storage using symlinks (mklink /D)

[ff00ff-66ff00-ff0000]

Hello,

I installed Revit Server 2026 on Windows Server 2019. IIS and all required components are installed and running, .NET Framework 4.8 is present, and I have administrative rights.

After installation, only Revit Server AutoSync 2026 is running. The Admin Service and Model Service did not appear in the Services list.

All Windows Features required for Revit Server are installed, and IIS services are running.

Does anyone know why the Admin and Model Services might not be created after installation? How can I ensure that all services are installed correctly?

Thank you!

[ff00ff-66ff00-ff0000]

Title: Revit Server 2026 installs only AutoSync Service – Admin and Model Services missing

Body:
Hello,

I installed Revit Server 2026 on Windows Server 2019.

Environment:

• IIS and all required roles are installed and running

• .NET Framework 4.8 is installed

• SQL Server Express is installed and running

• Setup was run as administrator

Problem:
After installation, only Revit Server AutoSync 2026 service appears. The Admin Service and Model Service are missing.

I suspect that the distribution I have might be a trimmed/corporate version that doesn’t include all Revit Server components.

Has anyone encountered this issue with Revit Server 2026? Is it possible that the installer is missing Admin and Model services?

Thank you!

[augusto.rubio]

Hi, SQL Server Express it's not a requirement, as far as I know. You trie uninstall, download Revit Server again in Autodesk download page and install again.

Your system is updated?

When you install the Revit Server, you confirmed in installation page the rolls of Server?

And you put the RSN.ini with the IP of the server inside ProgramData on the Server and the client?