OWA Rights management operation failed

Request
Url: https://sbs2011.domain.at:443/owa/forms/premium/SubPageEventHandler.aspx?ae=Item&a=Preview&t=IPM.Conversation&id=CID.9S5iQjY5SX6CJF1sWffA3w%3d%3d.LgAAAACPrw9OSo25Sr2MNlHFa8VvAQCIk95NXO%2f5TaEsFIl5wPbMAAAAdAcRAAAB.%2fAsAAAB0Bw0AAAAAFRIAAAAAAAA%3d&calist=&canary=cdaf753048114344b927b6733ca0295e&SP=1&subpage=ReadConversation.ascx
User host address: 195.130.198.250
User: Delta Admin
EX Address: /o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn= Admin
SMTP Address: Admin@domain.at
OWA version: 14.1.339.1
Mailbox server: SBS2011.domain.local

Exception
Exception type: Microsoft.Exchange.Data.Storage.RightsManagementPermanentException
Exception message: Rights management operation failed.

Call stack
bei Microsoft.Exchange.Clients.Owa.Core.UserContext.get_IsIrmEnabled() bei Microsoft.Exchange.Clients.Owa.Premium.ConversationUtilities.LoadConversation(UserContext userContext, OwaStoreObjectId owaConversationId, PropertyDefinition requestedProperties) bei Microsoft.Exchange.Clients.Owa.Premium.ReadConversation.OnLoad(EventArgs e) bei System.Web.UI.Control.LoadRecursive() bei System.Web.UI.Control.LoadRecursive() bei System.Web.UI.Control.LoadRecursive() bei System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Inner Exception
Exception type: Microsoft.Exchange.Security.RightsManagement.RightsManagementException
Exception message: BindValidityTimeViolated

Call stack
bei Microsoft.Exchange.Security.RightsManagement.Errors.ThrowOnErrorCode(Int32 hr, LocalizedString contextMessage) bei Microsoft.Exchange.Security.RightsManagement.Errors.ThrowOnErrorCode(Int32 hr) bei Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.DrmEnvironment.InitializeEnvironment() bei Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.Initialize() bei Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.InitializeIfNeeded() bei Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.get_IRMConfig() bei Microsoft.Exchange.Clients.Owa.Core.UserContext.get_IsIrmEnabled()