Refer to the sections below for different potential causes and steps to solve this issue.
If you are using concurrent unmanaged Licenses, the activation status under Network Licenses remains default grey even If you have access to them. This is a purely cosmetic issue and should not prohibit your access to the software. For more information, refer to Unable to Activate Software Using Concurrent Unmanaged Network Licenses
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A valid service agreement may be required, and support options vary by country.