If a move the mailbox to another server it works fine.
System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
Microsoft.Exchange.Security.RightsManagement.DrmClientUtils.GetServiceLocation(SafeRightsManagementSessionHandle sessionHandle, ServiceType serviceType, ServiceLocation serviceLocation, String issuanceLicense)
Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.GetOnPremiseRmsServerUri()
Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.GetRmsServerActiveCryptoMode()
Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.GetMachineCertIndexFromMsDrmBitsAndRmsServerCryptoMode()
Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.DrmEnvironment.InitializeEnvironment()
Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.Initialize()
Microsoft.Exchange.Data.Storage.RightsManagement.RmsClientManager.InitializeIfNeeded()
Microsoft.Exchange.Clients.Owa.Core.UserContext.get_IsIrmEnabled()
Microsoft.Exchange.Clients.Owa.Core.OwaSafeHtmlOutboundCallbacks.GetAttachmentCollection(Item item, UserContext userContext)
Microsoft.Exchange.Clients.Owa.Core.OwaSafeHtmlOutboundCallbacks..ctor(Item item, Boolean userLogon, Boolean isEmbedded, String itemUrl, Boolean isJunkOrPhishing, OwaContext owaContext, Boolean isEditableContent)
Microsoft.Exchange.Clients.Owa.Basic.BodyConversionUtilities.GenerateNonEditableMessageBodyAndRenderInfobarMessages(Item item, TextWriter writer, OwaContext owaContext, Infobar infobar, Boolean allowWebBeacon, Boolean forceEnableItemLink,
String itemType, String action, String state, Boolean isEmbedded, String attachmentUrl)
Microsoft.Exchange.Clients.Owa.Basic.OwaForm.LoadMessageBodyIntoStream(TextWriter writer)
ASP.forms_basic_basicreadmessage_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer)
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
System.Web.UI.Page.Render(HtmlTextWriter writer)
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)