Some Teams users could not access to their On premise Exchange Calendar

Décidément la fonctionnalité CalendarAPP est capricieuse. J’avais passé plus de 2 jours de travail en troubleshooting pour espérer faire fonctionner cette solution et j’avais finalement réussi pour un seul utilisateur. Seulement pour les autres utilisateurs avec la même configuration cela ne fonctionne pas. J’ai repassé la configuration en revue, fait des tests dans tous les sens, examiner les journaux Teams dans lesquels je n’ai trouvé aucune informations importante. Rien à faire.
Ce qui est inquiétant c’est que je ne suis pas le seul. Le fonctionnement de la solution annoncée par Microsoft à l’air pour le moins chaotique. C’est en tout ce qu’il en ressort des discussions sur les forums que j’ai pu lire (https://techcommunity.microsoft.com/t5/exchange-team-blog/configuring-teams-calendar-access-for-exchange-on-premises/ba-p/1484009#comments)

The CalendarAPP functionality is definitely capricious. I had spent more than 2 days troubleshooting to hope to make this solution work and I had finally succeeded for one user. Only for the other users with the same configuration it does not work. I went through the configuration again, did tests in all directions, examined the Teams logs in which I found no important information. Nothing to do.
What is worrying is that I am not the only one. The functioning of the solution announced by Microsoft looks chaotic to say the least. That’s what I’ve read in the forum discussions (https://techcommunity.microsoft.com/t5/exchange-team-blog/configuring-teams-calendar-access-for-exchange-on-premises/ba-p/1484009#comments)

J’ai donc ouvert un second ticket auprès du support Microsoft qui .. escalade. Vous trouverez ci-dessous la configuration en place sur le lab et les différents tests réalisés.

So I opened a second ticket with the Microsoft support which … escalation. You will find below the configuration in place on the lab and the various tests performed.

OnPremiseConfiguration
Exchange server version
Teams version
Get-OrganizationConfig | Select-Object Ews*
Get-CasMailbox jbon@cloudmenow.net | Select-Object Ews*
On Premise Autodiscover and Web Service test
Get-SharingPolicy

If the free/busy problem persists, make sure that the sharing policies in the on-premises Exchange Server environment and in Exchange Online match. To determine this, run the following command in the Exchange Management Shell, and then note the value in the Domains field in the results:
Test-OutlookWebServices -identity jbon@cloudmenow.net -MailboxCredential $C
Test-OAuthConnectivity -Service EWS -TargetUri https://outlook.office365.com/ews/exchange.asmx -Mailbox jbon@cloudmenow.net
Invoke-RestMethod
Online configuration
Get-OrganizationConfig | Select-Object Ews*
Teams calendar APP enabled
Get-Sharingpolicy
Get-federation Information
Get-OrganizationRelationship

The TargetApplicationUri and TargetAutodiscoverEpr values match the equivalent values from the Get-FederationInformation cmdlet.
Get-mailuser -identity « jean Bon »

PS C:\Users\administrator.LT01> Get-MailUser -Identity « Jean Bon » | fl

RunspaceId : b7f28250-72c7-48ec-9280-af5e57721faa

DeliverToMailboxAndForward : False

ExchangeGuid : bc525b5b-9b34-4a0d-955e-7d9b1151893b

MailboxContainerGuid :

AggregatedMailboxGuids : {}

ArchiveGuid : 00000000-0000-0000-0000-000000000000

ArchiveName : {}

ArchiveQuota : Unlimited

ArchiveWarningQuota : Unlimited

ProhibitSendQuota : 99 GB (106,300,440,576 bytes)

ProhibitSendReceiveQuota : 100 GB (107,374,182,400 bytes)

IssueWarningQuota : 98 GB (105,226,698,752 bytes)

ForwardingAddress :

ArchiveDatabase :

ArchiveStatus : None

DisabledArchiveDatabase :

DisabledArchiveGuid : 00000000-0000-0000-0000-000000000000

MailboxProvisioningConstraint :

MailboxRegion :

MailboxRegionSuffix : None

MailboxRegionLastUpdateTime :

MailboxProvisioningPreferences : {}

ExchangeUserAccountControl : None

ExternalEmailAddress : SMTP:jbon@cloudmenow.net

UsePreferMessageFormat : False

JournalArchiveAddress :

MessageFormat : Mime

MessageBodyFormat : TextAndHtml

MacAttachmentFormat : BinHex

ProtocolSettings : {}

RecipientLimits : Unlimited

SamAccountName : $GO3E71-K7O9ME0J7PNF

UseMapiRichTextFormat : UseDefaultSettings

UserPrincipalName : jbon@cloudmenow.net

WindowsLiveID : jbon@cloudmenow.net

MicrosoftOnlineServicesID : jbon@cloudmenow.net

MailboxMoveTargetMDB :

MailboxMoveSourceMDB :

MailboxMoveFlags : None

MailboxMoveRemoteHostName :

MailboxMoveBatchName :

MailboxMoveStatus : None

MailboxRelease :

ArchiveRelease :

ImmutableId :

PersistedCapabilities : {}

SKUAssigned :

ResetPasswordOnNextLogon : False

WhenMailboxCreated :

LitigationHoldEnabled : False

SingleItemRecoveryEnabled : False

ComplianceTagHoldApplied : False

WasInactiveMailbox : False

DelayHoldApplied : False

DelayReleaseHoldApplied : False

InactiveMailboxRetireTime :

OrphanSoftDeleteTrackingTime :

RetentionHoldEnabled : False

EndDateForRetentionHold :

StartDateForRetentionHold :

RetentionComment :

RetentionUrl :

LitigationHoldDate :

LitigationHoldOwner :

RetainDeletedItemsFor : 14.00:00:00

CalendarVersionStoreDisabled : False

UsageLocation : France

SharedWithReference :

JoinedSmtpAddress :

MailboxLocations : {1;832db1bd-bcf7-49cf-985b-db7e0ea735e7;ComponentShared;eurprd08.prod.outlook.com;f9dd1e3a-1f0c-47c3-a8ca-afc33ecb790b}

IsSoftDeletedByRemove : False

IsSoftDeletedByDisable : False

IsInactiveMailbox : False

WhenSoftDeleted :

InPlaceHolds : {}

RecoverableItemsQuota : 100 GB (107,374,182,400 bytes)

RecoverableItemsWarningQuota : 98 GB (105,226,698,752 bytes)

UserCertificate : {}

UserSMimeCertificate : {}

AccountDisabled : False

StsRefreshTokensValidFrom : 6/24/2021 2:35:21 AM

DataEncryptionPolicy :

OtherMail :

GuestInfo :

Extensions : {}

HasPicture : False

HasSpokenName : False

IsDirSynced : True

AcceptMessagesOnlyFrom : {}

AcceptMessagesOnlyFromDLMembers : {}

AcceptMessagesOnlyFromSendersOrMembers : {}

AddressListMembership : {\All Mail Users(VLV), \All Recipients(VLV), \Offline Global Address List, \All Users…}

AdministrativeUnits : {}

Alias : jbon

ArbitrationMailbox :

BypassModerationFromSendersOrMembers : {}

OrganizationalUnit : eurpr08a001.prod.outlook.com/Microsoft Exchange Hosted Organizations/cloudmenow.onmicrosoft.com

CustomAttribute1 :

CustomAttribute10 :

CustomAttribute11 :

CustomAttribute12 :

CustomAttribute13 :

CustomAttribute14 :

CustomAttribute15 :

CustomAttribute2 :

CustomAttribute3 :

CustomAttribute4 :

CustomAttribute5 :

CustomAttribute6 :

CustomAttribute7 :

CustomAttribute8 :

CustomAttribute9 :

ExtensionCustomAttribute1 : {}

ExtensionCustomAttribute2 : {}

ExtensionCustomAttribute3 : {}

ExtensionCustomAttribute4 : {}

ExtensionCustomAttribute5 : {}

DisplayName : Jean Bon

EmailAddresses : {SIP:jbon@cloudmenow.net, smtp:jbon@cloudmenow.mail.onmicrosoft.com, smtp:jbon@cloudmenow.onmicrosoft.com, X500:/o=First Organization/ou=Exchange Administrative Group

(FYDIBOHF23SPDLT)/cn=Recipients/cn=0ef04deb1c4c413796590fb415143682-Jean…}

GrantSendOnBehalfTo : {}

ExternalDirectoryObjectId : 6d10553b-0bf2-492c-96f4-c53a60f3eddf

HiddenFromAddressListsEnabled : False

LastExchangeChangedTime :

LegacyExchangeDN : /o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=6b1c479b974b4ca58ebfabc4d2ed11f6-jbon

MaxSendSize : Unlimited

MaxReceiveSize : Unlimited

ModeratedBy : {}

ModerationEnabled : False

PoliciesIncluded : {}

PoliciesExcluded : {{26491cfc-9e50-4857-861b-0cb8df22b5d7}}

EmailAddressPolicyEnabled : False

PrimarySmtpAddress : jbon@cloudmenow.net

RecipientType : MailUser

RecipientTypeDetails : MailUser

RejectMessagesFrom : {}

RejectMessagesFromDLMembers : {}

RejectMessagesFromSendersOrMembers : {}

RequireSenderAuthenticationEnabled : False

SimpleDisplayName :

SendModerationNotifications : Always

UMDtmfMap : {emailAddress:5266, lastNameFirstName:2665326, firstNameLastName:5326266}

WindowsEmailAddress : jbon@cloudmenow.net

MailTip :

MailTipTranslations : {}

Identity : Jean Bon

Id : Jean Bon

IsValid : True

ExchangeVersion : 1.1 (15.0.0.0)

Name : Jean Bon

DistinguishedName : CN=Jean Bon,OU=cloudmenow.onmicrosoft.com,OU=Microsoft Exchange Hosted Organizations,DC=EURPR08A001,DC=prod,DC=outlook,DC=com

ObjectCategory : EURPR08A001.prod.outlook.com/Configuration/Schema/Person

ObjectClass : {top, person, organizationalPerson, user}

WhenChanged : 6/24/2021 3:23:35 AM

WhenCreated : 6/24/2021 2:35:55 AM

WhenChangedUTC : 6/24/2021 10:23:35 AM

WhenCreatedUTC : 6/24/2021 9:35:55 AM

ExchangeObjectId : 669270d5-4da0-41e9-a57a-5763c4d1abdf

OrganizationId : EURPR08A001.prod.outlook.com/Microsoft Exchange Hosted Organizations/cloudmenow.onmicrosoft.com – EURPR08A001.prod.outlook.com/ConfigurationUnits/cloudmenow.onmicrosoft.com/Configuration

Guid : 669270d5-4da0-41e9-a57a-5763c4d1abdf

OriginatingServer : DB8PR08A01DC003.EURPR08A001.prod.outlook.com

ObjectState : Changed

PS C:\Users\administrator.LT01>
Test Calendar