<p>Hello,</p><p></p><p>I have my exchange server 2013 running for the last few months now and everything going smoothly. In the last few weeks I have noticed that in the event log I see a lot of Event ID 1003 MSExchange Front End HTTP Proxy:</p><table border="0" cellspacing="0"><tbody><tr><td nowrap="nowrap" style="font-family:'Segoe UI';vertical-align:top;" width="130"><strong></strong></td><td style="font-family:'Segoe UI';vertical-align:top;">Oab</td></tr></tbody></table><table border="0" cellspacing="0"><tbody><tr><td nowrap="nowrap" width="15"></td><td nowrap="nowrap" width="15"></td><td nowrap="nowrap" style="font-family:'Segoe UI';vertical-align:top;" width="130"><strong></strong></td><td style="font-family:'Segoe UI';vertical-align:top;"><p>System.ArgumentNullException: <br />Value cannot be null. Parameter name: sourceObject at <br />Microsoft.Exchange.HttpProxy.AnchorMailbox..ctor(AnchorSource anchorSource, <br />Object sourceObject, IRequestContext requestContext) at <br />Microsoft.Exchange.HttpProxy.UserADRawEntryAnchorMailbox..ctor(ADRawEntry <br />adRawEntry, IRequestContext requestContext) at <br />Microsoft.Exchange.HttpProxy.OabProxyRequestHandler.ResolveAnchorMailbox() at <br />Microsoft.Exchange.HttpProxy.ProxyRequestHandler.InternalBeginCalculateTargetBackEnd(AnchorMailbox& <br />anchorMailbox) at <br />Microsoft.Exchange.HttpProxy.ProxyRequestHandler.<BeginCalculateTargetBackEnd>b__27()<br />at Microsoft.Exchange.Common.IL.ILUtil.DoTryFilterCatch(TryDelegate tryDelegate, <br />FilterDelegate filterDelegate, CatchDelegate <br />catchDelegate)</p><p></p></td></tr></tbody></table>
Can someone help me how to resolve this issue?
Jimmy
