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Outlook Web App error for new user

holtzer asked
Last Modified: 2015-03-16

Recently, our new  user can't get on OWA because their regional setting page is returning "An unexpected error occurred and your request couldn't be handled."

with "Url: https://mail.shdm.org:443/owa/languageselection.aspx

I've search many site and i've not been able to find a working solution.

I've check the redirection, everything seems ok

here is the complete detail message

	An unexpected error occurred and your request couldn't be handled.

Url: https://mail.shdm.org:443/owa/languageselection.aspx
User: promoteurs@shdm.org
EX Address: /o=SHDM/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=promoteurs790
SMTP Address: promoteurs@shdm.org
OWA version:

Exception type: System.ArgumentNullException
Exception message: Value cannot be null. Parameter name: value

Call stack
Microsoft.Exchange.Clients.Owa.Core.Utilities.RenderDirectionEnhancedValue(TextWriter output, String value, Boolean isRtl)
ASP.languageselection_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.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

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Hope that someone can help!
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