Update ea-portal-administration.md

Currently, there is no estimated time until activation, so it is difficult for users to understand when actually operating.

Author: felixliu20230327

articles/cost-management-billing/manage/ea-portal-administration.md

@@ -50,7 +50,7 @@ Make sure that you have the user's email address and preferred authentication me
 
 #### If you're not an enterprise administrator
 
-If you're not an enterprise administrator, contact an enterprise administrator to request that they add you to an enrollment. The enterprise administrator uses the preceding steps to add you as an enterprise administrator. After you're added to an enrollment, you receive an activation email.
+If you're not an enterprise administrator, contact an enterprise administrator to request that they add you to an enrollment. The enterprise administrator uses the preceding steps to add you as an enterprise administrator. After you're added to an enrollment, you receive an activation email. It takes time from account registration to activation (about 5~10 minutes).
 
 #### If your enterprise administrator can't help you