LDAP: //CN=TS-Enterprise-License-Server,CN=site name,CN=sites,CN=configuration-container




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LDAP: //CN=TS-Enterprise-License-Server,CN=site name,CN=sites,CN=configuration-container.

Each license server should contain 50% of the CALs that you use for load balancing. If a license server does not have valid CALs, then that license server will attempt to refer to other license servers with valid CALs for license issuance. (This applies to both enterprise license servers and domain license servers.)

The following table provides a summary of high-availability scenarios for issuing temporary and permanent licenses.

Table 1   License Issuance Matrix






License Server A - Available

License Server A - Down

License Server B - Available

License Server B - Down

License Server A and License Server B Down

New Client License

Issue temporary license for 90 days

Failover to License Server B

Issue temporary license for 90 days

Failover to License Server A

Fail to connect

Existing Temporary License

Issue permanent license for 52-89 days

Failover to License Server B

Issue permanent license for 52-89 days

Failover to License Server A

Allow connection until expired

Expired Temporary License

Issue permanent license for 52-89 days

Failover to License Server B

Issue permanent license for 52-89 days

Failover to License Server A

Fail to connect

Existing Permanent License

Allow connect—will reissue license at 7 days before expiration

Failover to License Server B

Allow connect—will reissue license at 7 days before expiration

Failover to License Server A

Allow connect—will fail when the CAL expires

Expired Permanent License

Reissue license with new expiration

Failover to License Server B

Reissue license with new expiration

Failover to License Server A

Fail to connect

Existing Windows 2000 License

Allow connection

Allow connection

Allow connection

Allow connection

Allow connection

Each client will begin a license request and upgrade 7 days prior to the license expiration date. This should allow sufficient time to address any issues with individual license servers. If all license servers are down at the same time, new clients or clients with expired licenses will be denied access. In addition, license servers should be separated by network subnets to ensure that a network outage does not prevent users from connecting to a license Server.

Finally, administrators should use the Terminal Server Licensing Tool to ensure that at least 10% of their CALs are available on each license server. However, if available licenses are limited to a single license server that suffers an outage, clients with expired licenses will be denied access immediately, and clients with licenses that expire within the next 7 days will be denied access on their expiration dates.




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