To retrieve your Server Key, you typically need to access the Azure portal or the relevant management interface for your specific server type. If you have lost access to the mobile number associated with your account, you may need to go through account recovery options provided by Azure or the service you are using. Unfortunately, the context provided does not contain specific steps for retrieving a Server Key without access to the mobile number.
If you are using Azure SQL Database, you can interact with server keys through the Azure Management SDK or the Azure portal, but you will need appropriate permissions to access this information.
For further assistance, consider reaching out to Azure support or your organization's IT department for help with account recovery and accessing your server key.
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