Thank you both for you help. Nothing provided has fixed my situation yet. Here is the output from Get-WebServicesVirtualDirectory:
RunspaceId : fa7fa6bd-f32a-49d6-891e-ae753aec86f2
CertificateAuthentication :
InternalNLBBypassUrl :
GzipLevel : Low
MRSProxyEnabled : True
Name : EWS (Default Web Site)
InternalAuthenticationMethods : {Basic, Ntlm, WindowsIntegrated, WSSecurity, OAuth}
ExternalAuthenticationMethods : {Basic, Ntlm, WindowsIntegrated, WSSecurity, OAuth}
LiveIdNegotiateAuthentication :
WSSecurityAuthentication : True
LiveIdBasicAuthentication : False
BasicAuthentication : True
DigestAuthentication : False
WindowsAuthentication : True
OAuthAuthentication : True
AdfsAuthentication : False
MetabasePath : IIS://SEIExchange.XXXXXXX.com/W3SVC/1/ROOT/EWS
Path : C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\EWS
ExtendedProtectionTokenChecking : None
ExtendedProtectionFlags : {}
ExtendedProtectionSPNList : {}
AdminDisplayVersion : Version 15.0 (Build 1497.2)
Server : SEIEXCHANGE
InternalUrl : https://email.XXXXXXX.com/EWS/Exchange.asmx
ExternalUrl : https://email.XXXXXXX.com/EWS/Exchange.asmx
AdminDisplayName :
ExchangeVersion : 0.10 (14.0.100.0)
DistinguishedName : CN=EWS (Default Web Site),CN=HTTP,CN=Protocols,CN=SEIEXCHANGE,CN=Servers,CN=Exchange
Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=SEI,CN=Microsoft
Exchange,CN=Services,CN=Configuration,DC=XXXXXXX,DC=com
Identity : SEIEXCHANGE\EWS (Default Web Site)
Guid : b181707f-d9cf-42cd-b120-2110891ad438
ObjectCategory : XXXXXXX.com/Configuration/Schema/ms-Exch-Web-Services-Virtual-Directory
ObjectClass : {top, msExchVirtualDirectory, msExchWebServicesVirtualDirectory}
WhenChanged : 4/4/2023 10:23:24 PM
WhenCreated : 5/17/2015 6:36:34 PM
WhenChangedUTC : 4/5/2023 3:23:24 AM
WhenCreatedUTC : 5/17/2015 11:36:34 PM
OrganizationId :
Id : SEIEXCHANGE\EWS (Default Web Site)
OriginatingServer : SEIDC01.XXXXXXX.com
IsValid : True
ObjectState : Changed
Logs:
The Mailbox Replication Service was unable to connect to the remote server using the credentials provided. Please check the credentials and try again. The call to 'https://6fbbfcd9-9983-4bc7-8c9f-d44e461f6d24.resource.mailboxmigration.his.msappproxy.net/EWS/mrsproxy.svc' failed. Error details: The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Basic realm="6fbbfcd9-9983-4bc7-8c9f-d44e461f6d24.resource.mailboxmigration.his.msappproxy.net",Negotiate,NTLM'. --> The remote server returned an error: (401) Unauthorized.. --> The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Basic realm="6fbbfcd9-9983-4bc7-8c9f-d44e461f6d24.
resource.mailboxmigration.his.msappproxy.net",Negotiate,NTLM'.