Here's the error I'm getting.  Not sure what other process would have it open.

Greg

PS. We are on SmarterMail Enterprise 16.3.6885.  

[2020.01.02] 14:54:46 The process cannot access the file 'd:\SmarterMail\Archive\Current\archiveIndex_2020_01_02.dat' because it is being used by another process.   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)   at MailStore.MessageArchives.MessageArchiveIndexFile.GetEntryCount(String filePath)   at MailStore.MessageArchives.MessageArchiveIndexFile.WriteEntry(String directory, ArchiveIndexFileEntryConfig entry)   at MailStore.MessageArchives.MessageArchive.ArchiveMessage(String filePath, String returnPath, MimeReader mimeReader, List`1 allRecipients)   at RelayServer.DeliveryManager.#jBb(SpoolMessage #Nrb, String #f5i, String #g5i)14:54:46 [89073] Skipping spam filtering: Trusted Sender (system level)