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Seamless Single Sign-On: How to Fix ‘The RPC server is unavailable’ error in Windows



We have installed AD Connect successfully on a Windows 2012 r2 server. When configuring seamless sign on for the forest we get a warning at the end of the wizard stating "Failed to create single sign-on secret for True".


AD Connector needs to obtain the _ldap._tcp. and _kerberos._tcp. SRV records when connecting to your directory. You will get this error if the service cannot obtain these records from the DNS servers that you specified when connecting to your directory. For more information about these SRV records, see SRV record requirements.




How to resolve ‘The RPC server is unavailable’ error when enabling Seamless Single Sign-On



Sometimes an error appears indicating that the RPC server is unavailable.To fix this, sign in to the Windows Server Core machine and minimize the command prompt.A window prompts you to load a key.Complete the steps in the window and attempt to select the CA again fromcertsrv.msc.


wdt_ID Brief Description of Issue Brief Description of Fix Applicable Product Versions Affected (if known) Link to supplemental Support Article(s) 1 In the Persistency Table, you can only see one backend server connection mapped to the source client however when running command "show ns connection table" you can see connections from the source client to multiple backend servers. Upgrade to 11.1.54.14. 2 When more than one interface is in the same vLAN, you observe MAC moves and MAC conflicts between the NICs. Move the affected NICs in to different VLANs or else aggregate the interfaces in to a link aggregated channel. 3 When editing a document through the local machine you receive error "Cannot open a file, incorrect syntax or file path". A WireShark trace shows that the client was sending a request to a server not configured on any of the Content Switching policies. Once the server was mapped to a Load Balanced Virtual Server the document was editable through the local machine. 4 Content Switching Virtual Server sends traffic to the wrong Load Balancing Virtual Server, resulting in users receiving 404 HTTP responses. Enable "Drop Invalid HTTP Headers" on NetScaler. When the Content Switch receives HTTP invalid/corrupt header next packets from the same source IP the client may be redirected to an incorrect destination. 5 When trying to add a new node to a cluster, you receive rrror "Invalid interface name/number". Make sure you are not using an incorrect backplane interface ID number. 6 When connecting to RDP via NetScaler Clientless VPN bookmarks, the RDP window terminates with error "An internal error has occured" and the NetScaler resets the backend connection with reset code 9952. This is caused by a domain mismatch in the LDAP Profile. The SSO Name attribute should be set to "SamAccountName". 7 In a High Availability setup, an unusually large spike in the number of persistent connections may result in under performance of the Secure Socket Funneling channel between the primary and secondary node. This under performance can eventually lead to session build up on the primary node and cause persistence to fail. Users are then sent to backend servers based on the Load Balancing method. This is a known issue and will be resolved from NetScaler versions 12.0.53.x, 11.1.56.x and 11.0.70.x. As a workaround you can enable Nagle's Algorithm and disable Window Scaling on the "nstcp_internal_apps" TCP profile. 8 You are unable to bind multiple services to a Load Balancing Virtual Servr at the same time using the GUI. Upgrade to NetScaler version 11.1.53.x. NetScaler 11.1.51.x and 11.1.52.x. 9 The NetScaler Gateway Plugin interrupts DHCP requests that should be sent through the physical interface. Instead these requests are sent through the VPN tunnel. This is a known issue. For Windows devices, the issue is fixed in 11.1 and 11.0.67.x. For MAC, a fix should be coming as part of the "High Sierra" MAC plugin update. 10 Applications launched through NetScaler fail with no specific error. The loading dialog box appears and then dissapears. There is no issue with launches internally via StoreFront direct. NetScaler tried to resolve the VDAs FQDN over UDP and the DNS response is received with a truncated bit. NetScaler should initiate a DNS query over TCP for the same FQDN but does not. This issue is being worked on by Citrix. As a workaround you can either add the VDA FQDN as a DNS A record directly on NetScaler or else reduce the size of the DNS response so that it can be accomodated in 512 bytes. table.wpDataTable table-layout: fixed !important; table.wpDataTable td, table.wpDataTable th white-space: normal !important; table.wpDataTable td.numdata text-align: right !important;


It's great to be able to run Graph API requests in PowerShell scripts if everything goes right. This article describes why some common Graph API errors occur in scripts and what to do when the errors happen. Most errors are due to permissions assigned to the Azure AD apps used to run scripts and getting the basics will resolve those problems. 2ff7e9595c


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