The error attached this occurring when trying to save a comrpromisso in MSCRM follows log:
<s: Envelope xmlns: s = "schemas.xmlsoap.org/.../envelope">
<s: Body>
<s: Fault> <faultcode> s: Client </ faultcode>
<faultstring xmlns: xml = "www.w3.org/.../namespace" xml: lang = "en-US">
Invalid email address. For more information, contact your system administrator.
</ faultstring> <detail>
<OrganizationServiceFault xmlns = "schemas.microsoft.com/.../Contracts">
<ErrorCode> -2147204718 </ errorcode> <ErrorDetails />
<Message> Invalid email address. For more information, contact your system administrator. </ Message>
<Timestamp> 2015-12-15T16: 30: 15.1242626Z </ Timestamp>
<InnerFault> <ErrorCode> -2147204718 </ errorcode> <ErrorDetails />
<Message> Invalid email address. For more information, contact your system administrator. </ Message>
<Timestamp> 2015-12-15T16: 30: 15.1242626Z </ Timestamp>
<InnerFault xmlns: i = "www.w3.org/.../XMLSchema-instance" i: nil = "true" />
<TraceText xmlns: i = "www.w3.org/.../XMLSchema-instance" i: nil = "true" />
</ InnerFault>
<TraceText xmlns: i = "www.w3.org/.../XMLSchema-instance" i: nil = "true" />
</ OrganizationServiceFault> </ detail>
</ s: Fault>
</ s: Body>
</ s: Envelope>
Tank You.