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1 | 1 | --- |
2 | 2 | title: Cannot connect to RDS because no RD Licensing servers are available |
3 | 3 | description: This article describes how to troubleshoot RDS connection errors that are related to Remote Desktop licensing. |
4 | | -ms.date: 02/08/2025 |
| 4 | +ms.date: 02/13/2025 |
5 | 5 | manager: dcscontentpm |
6 | 6 | audience: itpro |
7 | 7 | ms.topic: troubleshooting |
@@ -168,23 +168,21 @@ The **RD Licensing Diagnoser Information** section shows more information about |
168 | 168 |
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169 | 169 | The following table shows which RDS CAL and RD Session Host versions are compatible with one another. |
170 | 170 |
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171 | | -| |RDS 2008 R2 and earlier CAL |RDS 2012 CAL |RDS 2016 CAL |RDS 2019 CAL | |
172 | | -| --- | --- | --- | --- | --- | |
173 | | -|**2008, 2008 R2 session host** |Yes |Yes |Yes |Yes | |
174 | | -|**2012 session host** |No |Yes |Yes |Yes | |
175 | | -|**2012 R2 session host** |No |Yes |Yes |Yes | |
176 | | -|**2016 session host** |No |No |Yes |Yes | |
177 | | -|**2019 session host** |No |No |No |Yes | |
| 171 | +|Session host version|RDS 2016 CAL|RDS 2019 CAL|RDS 2022 CAL|RDS 2025 CAL| |
| 172 | +| -------- | -------- | -------- | -------- | -------- | |
| 173 | +|Windows Server 2016 session host|Yes|Yes|Yes|Yes| |
| 174 | +|Windows Server 2019 session host|No|Yes|Yes|Yes| |
| 175 | +|Windows Server 2022 session host|No|No|Yes|Yes| |
| 176 | +|Windows Server 2025 session host|No|No|No|Yes| |
178 | 177 |
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179 | 178 | The following table shows which RDS CAL and license server versions are compatible with one another. |
180 | 179 |
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181 | | -| |RDS 2008 R2 and earlier CAL |RDS 2012 CAL |RDS 2016 CAL |RDS 2019 CAL | |
182 | | -| --- | --- | --- | --- | --- | |
183 | | -|**2008, 2008 R2 license server** |Yes |No |No |No | |
184 | | -|**2012 license server** |Yes |Yes |No |No | |
185 | | -|**2012 R2 license server** |Yes |Yes |No |No | |
186 | | -|**2016 license server** |Yes |Yes |Yes |No | |
187 | | -|**2019 license server** |Yes |Yes |Yes |Yes | |
| 180 | +|License server version|RDS 2016 CAL|RDS 2019 CAL|RDS 2022 CAL|RDS 2025 CAL| |
| 181 | +| -------- | -------- | -------- | -------- | -------- | |
| 182 | +|Windows Server 2016 license server|Yes|No|No|No| |
| 183 | +|Windows Server 2019 license server|Yes|Yes|No|No| |
| 184 | +|Windows Server 2022 license server|Yes|Yes|Yes|No| |
| 185 | +|Windows Server 2025 license server|Yes|Yes|Yes|Yes| |
188 | 186 |
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189 | 187 | For more information, see [RDS CAL version compatibility](/windows-server/remote/remote-desktop-services/rds-client-access-license#rds-cal-version-compatibility). |
190 | 188 |
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