diff --git a/src/sync.d b/src/sync.d
index ac17aff3..5c1c2726 100644
--- a/src/sync.d
+++ b/src/sync.d
@@ -1535,8 +1535,14 @@ final class SyncEngine
 								// use the cTag instead of the eTag because OneDrive may update the metadata of files AFTER they have been uploaded via simple upload
 								eTag = response["cTag"].str;
 							} else {
-								// cTag missing in response, use the original item.etag
-								eTag = item.eTag;
+								// Is there an eTag in the response?
+								if ("eTag" in response) {
+									// use the eTag from the response as there was no cTag
+									eTag = response["eTag"].str;
+								} else {
+									// no tag available - set to nothing
+									eTag = "";
+								}
 							}
 						} else {
 							// we are --dry-run - simulate the file upload
@@ -2021,10 +2027,25 @@ final class SyncEngine
 									if ((accountType == "personal") || (thisFileSize == 0)){
 										// Update the item's metadata on OneDrive
 										string id = response["id"].str;
-										string cTag = response["cTag"].str;
+										string cTag; 
+										
+										// Is there a valid cTag in the response?
+										if ("cTag" in response) {
+											// use the cTag instead of the eTag because OneDrive may update the metadata of files AFTER they have been uploaded
+											cTag = response["cTag"].str;
+										} else {
+											// Is there an eTag in the response?
+											if ("eTag" in response) {
+												// use the eTag from the response as there was no cTag
+												cTag = response["eTag"].str;
+											} else {
+												// no tag available - set to nothing
+												cTag = "";
+											}
+										}
+										
 										if (exists(path)) {
 											SysTime mtime = timeLastModified(path).toUTC();
-											// use the cTag instead of the eTag because OneDrive may update the metadata of files AFTER they have been uploaded
 											uploadLastModifiedTime(parent.driveId, id, cTag, mtime);
 										} else {
 											// will be removed in different event!
@@ -2092,9 +2113,24 @@ final class SyncEngine
 											writeln(" done.");
 										}
 										string id = response["id"].str;
-										string cTag = response["cTag"].str;
+										string cTag;
+										
+										// Is there a valid cTag in the response?
+										if ("cTag" in response) {
+											// use the cTag instead of the eTag because Onedrive may update the metadata of files AFTER they have been uploaded
+											cTag = response["cTag"].str;
+										} else {
+											// Is there an eTag in the response?
+											if ("eTag" in response) {
+												// use the eTag from the response as there was no cTag
+												cTag = response["eTag"].str;
+											} else {
+												// no tag available - set to nothing
+												cTag = "";
+											}
+										}
+										
 										SysTime mtime = timeLastModified(path).toUTC();
-										// use the cTag instead of the eTag because Onedrive may update the metadata of files AFTER they have been uploaded
 										uploadLastModifiedTime(parent.driveId, id, cTag, mtime);
 									} else {
 										// OneDrive Business account modified file upload handling