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The “Manage subscription” leads you directly to the page for managing the subscription of your company. Please consider that the inital loading of the channel has to be finished, to see this link. For adding the app to an channel follow this instruction https://communardo.atlassian.net/wiki/pages/resumedraft.action?draftId=1018855449. Furthermore your administrator has to give you the required permissions to see this link, by adding you to the “Licence Manager“ group. To add a person to this group, please follow this instruction Subcription handling | Licence Manager Group.