diff --git a/app/server/lib/Authorizer.ts b/app/server/lib/Authorizer.ts
index 6d321e51..a1030139 100644
--- a/app/server/lib/Authorizer.ts
+++ b/app/server/lib/Authorizer.ts
@@ -300,9 +300,17 @@ export async function addRequestUser(dbManager: HomeDBManager, permitStore: IPer
     mreq.users = [dbManager.makeFullUser(anon)];
   }
 
-  log.debug("Auth[%s]: id %s email %s host %s path %s org %s%s", mreq.method,
-            mreq.userId, mreq.user?.loginEmail, mreq.get('host'), mreq.path, mreq.org,
-            customHostSession);
+  const meta = {
+    customHostSession,
+    method: mreq.method,
+    host: mreq.get('host'),
+    path: mreq.path,
+    org: mreq.org,
+    email: mreq.user?.loginEmail,
+    userId: mreq.userId,
+    altSessionId: mreq.altSessionId,
+  };
+  log.rawDebug(`Auth[${meta.method}]: ${meta.host} ${meta.path}`, meta);
 
   return next();
 }
diff --git a/app/server/lib/Client.ts b/app/server/lib/Client.ts
index ed46f56c..1c3d1cfd 100644
--- a/app/server/lib/Client.ts
+++ b/app/server/lib/Client.ts
@@ -365,6 +365,8 @@ export class Client {
       meta.age = Math.floor(moment.duration(moment().diff(this._firstLoginAt)).asDays());
     }
     if (this._org) { meta.org = this._org; }
+    const altSessionId = this.getAltSessionId();
+    if (altSessionId) { meta.altSessionId = altSessionId; }
     meta.clientId = this.clientId;    // identifies a client connection, essentially a websocket
     meta.counter = this._counter;     // identifies a GristWSConnection in the connected browser tab
     return meta;
diff --git a/app/server/lib/FlexServer.ts b/app/server/lib/FlexServer.ts
index ca6b90cc..fcc025ac 100644
--- a/app/server/lib/FlexServer.ts
+++ b/app/server/lib/FlexServer.ts
@@ -581,6 +581,7 @@ export class FlexServer implements GristServer {
         org: mreq.org,
         email: mreq.user && mreq.user.loginEmail,
         userId: mreq.userId,
+        altSessionId: mreq.altSessionId,
       });
       return resp.status(200).send();
     }));
diff --git a/app/server/lib/GoogleExport.ts b/app/server/lib/GoogleExport.ts
index 54ba28d0..f0545bbe 100644
--- a/app/server/lib/GoogleExport.ts
+++ b/app/server/lib/GoogleExport.ts
@@ -22,9 +22,11 @@ export async function exportToDrive(
     throw new Error("No access token - Can't send file to Google Drive");
   }
 
+  const mreq = req as RequestWithLogin;
   const meta = {
-    docId : activeDoc.docName,
-    userId : (req as RequestWithLogin).userId
+    docId: activeDoc.docName,
+    userId: mreq.userId,
+    altSessionId: mreq.altSessionId,
   };
   // Prepare file for exporting.
   log.debug(`Export to drive - Preparing file for export`, meta);
diff --git a/app/server/lib/Sharing.ts b/app/server/lib/Sharing.ts
index f61d989c..a4f28a87 100644
--- a/app/server/lib/Sharing.ts
+++ b/app/server/lib/Sharing.ts
@@ -243,6 +243,7 @@ export class Sharing {
         parentActionHash: null,  // Gets set below by _actionHistory.recordNext...
       };
 
+      const altSessionId = client?.getAltSessionId();
       const logMeta = {
         actionNum,
         linkId: info.linkId,
@@ -250,6 +251,7 @@ export class Sharing {
         numDocActions: localActionBundle.stored.length,
         numRows: localActionBundle.stored.reduce((n, env) => n + getNumRows(env[1]), 0),
         author: info.user,
+        ...(altSessionId ? {session: altSessionId}: {}),
       };
       this._log.rawLog('debug', docSession, '_doApplyUserActions', logMeta);
       if (LOG_ACTION_BUNDLE) {
diff --git a/app/server/lib/expressWrap.ts b/app/server/lib/expressWrap.ts
index 6e634c6e..25964891 100644
--- a/app/server/lib/expressWrap.ts
+++ b/app/server/lib/expressWrap.ts
@@ -26,14 +26,17 @@ interface JsonErrorHandlerOptions {
  * Currently allows for toggling of logging request bodies and params.
  */
 const buildJsonErrorHandler = (options: JsonErrorHandlerOptions = {}): express.ErrorRequestHandler => {
+  const {shouldLogBody, shouldLogParams} = options;
   return (err, req, res, _next) => {
     const mreq = req as RequestWithLogin;
-    log.warn(
-      "Error during api call to %s: (%s)%s%s%s",
-      req.path, err.message, mreq.userId !== undefined ? ` user ${mreq.userId}` : '',
-      options.shouldLogParams !== false ? ` params ${JSON.stringify(req.params)}` : '',
-      options.shouldLogBody !== false ? ` body ${JSON.stringify(req.body)}` : '',
-    );
+    const meta = {
+      path: mreq.path,
+      userId: mreq.userId,
+      altSessionId: mreq.altSessionId,
+      body: shouldLogBody !== false ? req.body : undefined,
+      params: shouldLogParams !== false ? req.params : undefined,
+    };
+    log.rawWarn(`Error during api call to ${meta.path}: ${err.message}`, meta);
     let details = err.details && {...err.details};
     const status = details?.status || err.status || 500;
     if (details) {
diff --git a/app/server/lib/requestUtils.ts b/app/server/lib/requestUtils.ts
index 7cf93243..718e12c7 100644
--- a/app/server/lib/requestUtils.ts
+++ b/app/server/lib/requestUtils.ts
@@ -186,6 +186,7 @@ export async function sendReply<T>(
     log.rawDebug('api call', {
       url: req.url,
       userId: mreq.userId,
+      altSessionId: mreq.altSessionId,
       email: mreq.user && mreq.user.loginEmail,
       org: mreq.org,
       params: req.params,
diff --git a/app/server/lib/uploads.ts b/app/server/lib/uploads.ts
index de0f9f81..9dbdfd45 100644
--- a/app/server/lib/uploads.ts
+++ b/app/server/lib/uploads.ts
@@ -116,6 +116,7 @@ export async function handleOptionalUpload(req: Request, res: Response): Promise
     org: mreq.org,
     email: mreq.user && mreq.user.loginEmail,
     userId: mreq.userId,
+    altSessionId: mreq.altSessionId,
   };
 
   log.rawDebug(`Prepared to receive upload into tmp dir ${tmpDir}`, meta);