Stuck in import pst problem

Hello All,

I'm stuck in a very strange problem and need help.

I imported pst file to m365 exchange using lifecycle data management console (https://compliance.microsoft.com), i sent as usal my pst using azcopy; i validate my mapping file and then i launched import to 365, as I maded it several times.

After a long time (my pst are quite little (12 gb in two files) i got an import error.

The same error appears on log with each pst.

Many thanks for helping me.

Best regards.

Herve

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Here are the logs :

PST Filename,Target Mailbox,Import Status,Error,Total Items,Item Imported,Target Folder,Skipped Item Count,Last Failure,Total Item Size,Imported Item Size

mypstfilename.pst,___@___.___,Failed,Unknown,0,0,,0,System.NullReferenceException: Object reference not set to an instance of an object.

at Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext.RunAsyncTaskT

at Microsoft.Office.Compliance.Ingestion.OAuthProvider.GetAppTokenFromESTS(OAuthTokenType tokenType, String tenantId, String serviceName, String serviceHostName) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\OAuthProvider.cs:line 492

at Microsoft.Office.Compliance.Ingestion.OAuthProvider.OAuthHackToInsertServicePrincipal(String tenantId) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\OAuthProvider.cs:line 238

at Microsoft.Office.Compliance.Ingestion.OAuthProvider.GetAppTokenFromAcs(OAuthTokenType tokenType, String tenantId, String serviceName, String serviceHostName) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\OAuthProvider.cs:line 463

at Microsoft.Office.Compliance.Ingestion.OAuthProvider.<>c__DisplayClass18_0.<GetTenantToken>b__0(String serviceName) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\OAuthProvider.cs:line 198

at Microsoft.Office.Compliance.Ingestion.OAuthProvider.GetAuthToken(OAuthTokenType tokenType, String tenantId, String serviceHostName, Func`2 authentication) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\OAuthProvider.cs:line 367

at Microsoft.Office.Compliance.Ingestion.OAuthProvider.GetUserToken(OAuthTokenType tokenType, String tenantId, String upn, String puid, String serviceHostName, Boolean usingSts) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\OAuthProvider.cs:line 215

at Microsoft.Office.Compliance.Ingestion.PswsOAuthAuthenticator.Authenticate(HttpWebRequest request) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\PSWSProvider\PswsOAuthAuthenticator.cs:line 106

at Microsoft.Exchange.PswsClient.PswsCmdlet.InternalRun()

at Microsoft.Exchange.PswsClient.NewPswsCmdlet`1.Run()

at Microsoft.Office.Compliance.Ingestion.ExchangeIngestionProvider.CreateNewMailboxImportRequest(String targetId, String azureBlobStorageAccountUri, String azureBlobSASToken, Boolean isArchive, String azureStatusPublishEndpointInfo, String name, String targetRootFolder, Nullable`1 contentCodePage, Int32 unrecognizedMailLimitPercent, String rulesBlobSasUri, ILogWriter logWriter, String& cmdText, String& error) in k:\dbs\sh\nibr\1018_000434\cmd\0\sources\dev\ingestion\src\workloadapi\IngestionProvider\ExchangeIngestionProvider.cs:line 727,0,0