November 28, 2025
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Veeam Backup for Microsoft 365 consists of Backup proxy servers, Backup Proxy Pools, Backup Local repositories, and Object storage repositories. These are configured as locations for Microsoft 365 backup data. These can be configured on-premises, in the cloud, or in a hybrid configuration. Windows Backup proxy servers are auxiliary servers that you can configure to improve performance, scalability, and flexibility.

Veeam Backup for Microsoft 365 consists of Backup proxy servers, Backup Proxy Pools, Backup Local repositories, and Object storage repositories. These are configured as locations for Microsoft 365 backup data. These can be configured on-premises, in the cloud, or in a hybrid configuration.

Windows Backup proxy servers are auxiliary servers that you can configure to improve performance, scalability, and flexibility.

1. Login to the Veeam Backup for Microsoft 365 Manager server.

2. Open the Veeam Backup for Microsoft 365 console and click Connect.

3. On the Veeam Backup for Microsoft 365 console page, select Backup Infrastructure.

4. On the Backup Infrastructure page, right-click Backup Proxies and select Add backup proxy.

5. Select Microsoft Windows on the Proxy server operating system page and click Next.

6. In the Host field, enter a DNS name or IP address of a computer you want to use as a backup proxy server, select Use domain network and click Next.

7. On the Specify credentials to connect to the proxy server page, select Use the following account, enter the user name and password and click Next. The account must be a member of the Local Administrator group.

8. Please double-check the Windows firewall settings for the opening of the required ports if it happens. Network path not found or invalid credentials supplied error—the detailed information is below.

https://helpcenter.veeam.com/docs/vbo365/guide/vbo_used_ports.html?ver=80

9. Select the Local System account on the Specify account to run the proxy services and click Next.

10. Please ensure to download and install the Microsoft .NET Runtime 8.0 on the proxy server.

https://dotnet.microsoft.com/en-us/download/dotnet

11. Please ensure to download and install the Microsoft Windows PowerShell 7.4.2 or later version on the proxy server.

https://github.com/PowerShell/PowerShell/releases/download/v7.5.3/PowerShell-7.5.3-win-x64.msi

12. Click Finish.

13. Verify that the Microsoft Windows Backup proxy server has been added.

I hope you enjoy this post.

Cary Sun

X: @SifuSun

Web Site: carysun.com

Blog Site: checkyourlogs.net

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Author: Cary Sun

Cary Sun has a wealth of knowledge and expertise in data center and deployment solutions. As a Principal Consultant, he likely works closely with clients to help them design, implement, and manage their data center infrastructure and deployment strategies.
With his background in data center solutions, Cary Sun may have experience in server and storage virtualization, network design and optimization, backup and disaster recovery planning, and security and compliance management. He holds CISCO CERTIFIED INTERNETWORK EXPERT (CCIE No.4531) from 1999. Cary is also a Microsoft Most Valuable Professional (MVP), Microsoft Azure MVP, Veeam Vanguard and Cisco Champion. He is a published author with several titles, including blogs on Checkyourlogs.net, and the author of many books.
Cary is a very active blogger at checkyourlogs.net and is permanently available online for questions from the community. His passion for technology is contagious, improving everyone around him at what they do.

Blog site: https://www.checkyourlogs.net
Web site: https://carysun.com
Blog site: https://gooddealmart.com
Twitter: @SifuSun
in: https://www.linkedin.com/in/sifusun/
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