You will need to enter a 30-day evaluation license key and then delete unnecessary users. Then go to 'Settings > Licensing > Recalculate your user total'. Finally you can update the license key field with its previous value.
Please read the following KB for more details: https://confluence.atlassian.com/crowdkb/users-are-unable-to-log-in-after-updating-the-license-223223576.html
Hope this helps.
Thank you for response.
When I try to generate evaluation licese key it asks for server id.
I can not go to atlassian console so can not find server id using that option.
As per KB I checked https://my.atlassian.com/products but I do not see server ID. I can find all other details like SEN, license text, history, contacts, etc but I do not find server ID.
Is there any other way to find server ID?
Yes, there is.
You will find your Crowd server ID in <crowd.home>/shared/crowd.cfg.xml
As a reminder, <crowd.home> is the directory you defined in
crowd-webapp/WEB-INF/classes/crowd-init.properties when installing Crowd.
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