Exchange Delegation Federation / Microsoft Federation Gateway / Renew Certificate

EAC is alerting for certificate expiration.

It is easier to renew the certificate before expiration.

Generate new self signed certificate from exchange shell

Key Identifier ( Random name for the key)

$:\> $SKI = [System.Guid]::NewGuid().ToString("N");
$:\> echo $SKI
  3ecaf8d9942c4fb4848e6201810e0734

Create Key

New-ExchangeCertificate -DomainName 'Federation' -FriendlyName "Exchange Delegation Federation" `
  -Services Federation -SubjectKeyIdentifier $SKI -PrivateKeyExportable $true

Thumbprint                                Subject                                                                                                                                                                
----------                                -------                                                                                                                                                                
133F83817AD86C127C0A71B92214C52D6B3A4D31  CN=Federation                                                                                                                                                          

Set the "next" in exchange

$:\>Set-FederationTrust -Identity "Microsoft Federation Gateway" -Thumbprint 133F83817AD86C127C0A71B92214C52D6B3A4D31 -RefreshMetaData

WARNING: The federation trust has changed to prepare for the usage of a new certificate for Federation. `
You should update all TXT proof-of-ownership  records that were previously set in DNS for all the domains `
configured for Federation before publishing the new certificate.
The new hash-value should be replaced with the OrgNextCertificate proof value output generated with `
"Get-FederatedDomainProof -DomainName example.com".

Update DNS TXT record

Find and update the TXT record responsible for Federation

$:\>nslookup -type=txt example.com  8.8.8.8

example.com	text = "v=spf1 mx -all"
example.com	text = "google-site-verification=...
example.com	text = "qwa3SWMSP+278DT56LL2y+QmQ33UgQzRuofsRjLrZIyhl8O...=="

Authoritative answers can be found from:

Get-FederatedDomainProof -DomainName example.com| Format-List Thumbprint,Proof

//new
Thumbprint : 133F83817AD86C127C0A71B92214C52D6B3A4D31
Proof      : asaq33FMhbo05dK8M+Tek1gj7frqmnatO1hM5MWLx98yLivsrIJQ6M1Zk4W90bmSE4...==

//old
Thumbprint : 993FF8C8E1F312FE59CF6C047C60FAF35AC33F66
Proof      : qwa3SWMSP+278DT56LL2y+QmQ33UgQzRuofsRjLrZIyhl8O...==

New TXT record

$:\>nslookup -type=txt example.com  8.8.8.8

example.com	text = "v=spf1 mx -all"
example.com	text = "google-site-verification=...
example.com	text = "asaq33FMhbo05dK8M+Tek1gj7frqmnatO1hM5MWLx98yLivsrIJQ6M1Zk4W90bmSE4...=="

New TXT record

$:\>nslookup -type=txt example.com ns.local.dns

example.com	text = "v=spf1 mx -all"
example.com	text = "google-site-verification=...
example.com	text = "asaq33FMhbo05dK8M+Tek1gj7frqmnatO1hM5MWLx98yLivsrIJQ6M1Zk4W90bmSE4...=="

Test before change

$:\> Test-FederationTrust -UserIdentity mail@example.com

 Begin process.

STEP 1 of 6: Getting ADUser information for mail@example.com...
RESULT: Success.

STEP 2 of 6: Getting FederationTrust object for mail@example.com...
RESULT: Success.

STEP 3 of 6: Validating that the FederationTrust has the same STS certificates as the actual certificates published by the STS in the federation metadata.
RESULT: Success.

STEP 4 of 6: Getting STS and Organization certificates from the federation trust object...
RESULT: Success.
 

Validating current configuration for KLJWLKJDWL57623.example.com...
 
Validation successful.

STEP 5 of 6: Requesting delegation token...
RESULT: Success. Token retrieved.

STEP 6 of 6: Validating delegation token...
RESULT: Success.

Closing Test-FederationTrust...


RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : FederationTrustConfiguration
Type       : Success
Message    : FederationTrust object in ActiveDirectory is valid.

RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : FederationMetadata
Type       : Success
Message    : The federation trust contains the same certificates published by the security token service in its federation metadata.

RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : StsCertificate
Type       : Success
Message    : Valid certificate referenced by property TokenIssuerCertificate in the FederationTrust object.

RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : StsPreviousCertificate
Type       : Success
Message    : Valid certificate referenced by property TokenIssuerPrevCertificate in the FederationTrust object.

RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : OrganizationCertificate
Type       : Success
Message    : Valid certificate referenced by property OrgPrivCertificate in the FederationTrust object.

RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : TokenRequest
Type       : Success
Message    : Request for delegation token succeeded.

RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
Id         : TokenValidation
Type       : Success
Message    : Requested delegation token is valid.

Set Apply the "Next" certificate
 Set-FederationTrust -Identity "Microsoft Federation Gateway" -PublishFederationCertificate


Errors
FederationTrust object is expired
Certificate was created with local time. This was 2 hours earlier ... 

Solution: wait
https://jesperstahle.azurewebsites.net/?p=142

Error:
 ...
 STEP 4 of 6: Getting STS and Organization certificates from the federation trust object...
 WARNING: Could not retrieve orgPrivCertificate from GetOrganizationCertificates

 Closing Test-FederationTrust...
 ...
 RunspaceId : ea565-64c3-4656-9e7f-420a7b4a4d78
 Id         : OrganizationCertificate
 Type       : Error
 Message    : Certificate referenced by property OrgPrivCertificate in the FederationTrust object is expired.
 Error: GetOrganizationCertificates(federationTrust) returned null when called in Process()
    + CategoryInfo          : NotSpecified: (:) [], LocalizedException
    + FullyQualifiedErrorId : [Server=mail,RequestId=3fa41912-ddfa-41af-b063-92cb4fa6623d,TimeStamp=12/2/2019 8:46:58 AM] [FailureCategory=Cmdlet- LocalizedException] 3CE8F0B2
    + PSComputerName        : mail.example.com

Certificate
 $:\> get-federationtrust |select *
 RunspaceId                   : ea565-64c3-4656-9e7f-420a7b4a4d78
 ApplicationIdentifier        : 0000000048307
 ApplicationUri               : KLJWLKJDWL57623.example.com
 OrgCertificate               : [Subject]
                                 CN=Federation
                               [Issuer]
                                 CN=Federation
                               [Serial Number]
                                 JHKJD6756JHG26KJ54D6WD46QW
                               [Not Before]
                                 12/2/2019 9:23:23 AM
                               [Not After]
                                 12/2/2024 9:23:23  AM