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dual write error failed to authenticate and unable to get access token from tier1 cloud hosted to dynamics 365 sales erpcoder erpcoder microsoft dynamics 365 business management solution enthusiast search home about source code x and more posts comments admin development dynamics ax dynamics 365 finance and operations aif office bi powerbi covid 19 methodology dual write installation error missing dependencies vscode al download symbols authorization has failed dual write error failed to authenticate and unable to get access token from tier1 cloud hosted to dynamics 365 sales 6 may 2025 8 comments since tier1 cloud hosted environments che will be deprecated there are still good reasons to use them anyway instead of udes tier1 che from withing lifecycle services can be paired with power platform environment including dual write configuration with dynamics 365 sales in the tier1 configuration i ve encountered an authentication error at creating new records in fo history and symptoms i ve deployed a new tier1 dev test environment 10 0 43 to the linked azure subscriptions at the configuration dialog in lcs i ve enabled power platform integration based on dynamics 365 sandbox deployment took a while but succeeded after the deployment i ve restored a axdb database with some basic configurations and performed a full database synchronization in visual studio next i ve linked the d365 finance and supply chain machine with the deployed d365 sales sandbox environment from the lcs environment details page finally i ve enabled the dual write configuration also from the lcs environment details page in power platform admin center environment dynamics 365 apps two solutions were already deployed dynamics 365 dual write core and dynamics 365 dual write application core because the environment was a sales prototype i ve added the dynamics 365 dual write human resource dynamics 365 dual write finance dynamics 365 hr common tables dynamics 365 dual write global address book and dynamics 365 dual write supply chain solution from the app source in dynamics 365 finance supply chain at the data management workspace i ve imported the core solution and supply chain solution the table mappings have been populated successfully and i ve choosen to synchronize only one legal entity company with sales the basic table mappings e g legal entities customer groups currencies units size colors etc including initial synchronization from fo to sales were successful i ve also enabled synchronization between customersv3 and accounts in dynamics 365 sales it was possible to create a new account from type customer link it to the corresponding legal entity and assign a customer group the customer account from dynamics 365 sales was successfully synchronized into fo within seconds and became a customer vice versa from dynamics 365 finance supply chain to dynamics 365 sales did not work as soon as a new records in a synchronized table was create a dual write error message came up no matter if it was a customer product etc unable to write data to entity accounts authentication failed with error failed to authenticate for https __crm4 dynamics com api data v9 0 accounts for information on troubleshooting see https go microsoft com fwlink linkid 2244045 unable to get access token solution step by step microsoft has cut off che connections from accessing tenant information i found some blog posts from other folks dealing with business events and a microsoft documentation to s etup onebox environments following the instructions i ve done the following app registration i ve created an app registration in entraid i ve added the url of the d365 fo environment as response url from type web as well as the url including oauth i gave api permissions to user read user read all dynamics erp ax fullaccess and lcs user_impersonation self signed certificate via powershell following the documentation i ve create a simple self signed certification via powershell on the tier1 vm cername myselfcert cert new selfsignedcertificate subject cn certname certstorelocation cert currentuser my keyexportpolicy exportable keyspec signature keylength 2048 keyalgorithm rsa hashalgorithm sha256 export certificate cert cert filepath c users admin051a5b362b desktop certname cer add to root authorities the export generates a cer file by double clicking the file you can install the file on the computer i ve done this twice as local machine and choosen the place to be the root certificate authorities the same with installation as user and also selected the installation to be placed in the root certificate authorities web config and wif config the web config file can be found at k aosservice webroot directory i ve made a copy before editing and changed the following lines the spn is the application id from the app registration the thumbprint can be found in the cer file on the details tab add key aad realm value spn your application id add key infrastructure s2scertthumbprint value certificate thumbprint add key graphapi graphapiserviceprincipalcert value certificate thumbprint in the wif config i ve also added the application id xml version 1 0 system identitymodel identityconfiguration securitytokenhandlers securitytokenhandlerconfiguration audienceuris warning must be first element updated at web role instance startup add value spn 00000015 0000 0000 c000 000000000000 add value spn my_app_id_here application user in dynamics 365 power platform in the power platform admin center on the environment page under settings in groups users i ve added an application user i ve assigned system administrator role like the already existing finance and operations service account entraid application in fo finally to avoid any additional problems i ve also create a new record in dynamics 365 finance supply chain at the entraid applications page finally the synchronization from dynamics 365 finance supply chain to dynamics 365 sales was working customers products sales orders invoices etc can be created in fo and be found sales teilen sie dies mit share on linkedin opens in new window linkedin share on facebook opens in new window facebook email a link to a friend opens in new window email like loading related filed under admin dynamics 365 ce dynamics 365 finance and operations tagged with dual write dynamics 365 fo dynamics 365 sales entraid about erpcoder azure cloud architect and dynamics 365 enthusiast working in research development for insideax 8 responses to dual write error failed to authenticate and unable to get access token from tier1 cloud hosted to dynamics 365 sales compashi says 17 june 2025 at 08 48 absolutely fantastic one just one comment though its not very specific that you have to upload the certificate to the registered app id in the azure reply compashi says 17 june 2025 at 08 50 very well articulated and quite a problem the only comment i have is that its not mentioning that the created app id in azure is to be topped up the created self certificate i e upload the certificate in the azure for the newly created azure app id reply deewakar kumar says 6 july 2025 at 21 48 hi great post thanks for sharing this in the web config i see the following line already exists with a different application id add key aad realm value spn existing app id when configuring for the new app registration should this line be updated i e replace the existing app id with the new one or should we add a separate line with the new app id just want to confirm the correct approach to avoid conflicts thanks reply erpcoder says 7 july 2025 at 09 35 comment the existing line and replace it with your actual value reply karen says 17 october 2025 at 19 19 hi thank you for this helpful post i followed all the steps described here to fix the failed to authenticate and unable to get access token error between my tier 1 cloud hosted environment and dynamics 365 sales but the issue still persists is there anything else i should check for example certificate configuration app registration permissions or the service connection setup any additional guidance would be greatly appreciated reply gaetano says 7 july 2026 at 18 05 i also have the issue even if i followed all the steps did you managed to resolve reply merago says 11 august 2026 at 10 58 same here and that s after doing the missing part from this article namely uploading newly created cert for the new app reg reply chakradhar reddy says 22 march 2026 at 10 06 thanks i followed the steps and it worked for me reply leave a comment cancel reply δ tag cloud net admin ai and machine learning aif azure bi cloud covid 19 development dynamics 365 ce dynamics 365 finance and operations dynamics ax enterprise portal methodology mobile office powerbi r uncategorized upgrade blog at wordpress com comment reblog subscribe subscribed erpcoder join 46 other subscribers sign me up have a wordpress com account log in now privacy erpcoder copy shortlink view post in reader manage 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