Step-by-step guide
- Go to the Atlassian Enterprise License Agreement (ELA) Help Center
- Select "Upgrade/Downgrade a License"
- In the Summary field, enter something like "Upgrade SEN-XXXXXX to a Data Center license and to User Tier 1000" or just "Upgrade SEN-XXXXXXX to Data Center"

- Select your SEN # that you want to upgrade/downgrade
- Enter details in the Description field if necessary
- Select "Yes" under the "Upgrade to Data Center" pull down if you are upgrading to Data Center. Otherwise, you can leave this blank or select "No".

- Enter a Due Date (optional)
- Select the Create Button
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