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Function to iterate subfolders inside the folder

#fucntion to iterate subfolders inside folder
def iterateFolder(folder):
 #get list of Subfolders in folder
 colFolders = folder.Folders
 if(len(colFolders)>0):
 for objFolder in colFolders:

Open outlook application with MAPI protocol

outlook = win32com.client.Dispatch("Outlook.Application").GetNamespace("MAPI")

Get the root folder i.e "xyz@outlook.com"

root_folder = outlook.Folders.Item(1)

Iterate each folder in root_folder

for folder in root_folder.Folders:
 try:
 iterateFolder(folder)
 except:
 print "Can't open "+folder.Name 
 continue

Error message :

File "email_extraction_with_whole_body.py", line 126, in <module>
for folder in root_folder.Folders:
File "C:Python27libsite-packageswin32comclientdynamic.py", line 516, 
in __getattr__
ret = self._oleobj_.Invoke(retEntry.dispid,0,invoke_type,1)
pywintypes.com_error: (-2147352567, 'Exception occurred.', (4096, 
u'Microsoft Outlook', u'Microsoft Exchange is currently busy. If this 
message is still displayed in 30 minutes, contact your Exchange 
administrator.', None, 0, -2147221231), None) 

I decoded the message using

import win32api
win32api.FormatMessage(--2147352567)

Error after decoding:

pywintypes.error: (317, 'FormatMessage', 'The system cannot find message text for 
message number 0x%1 in the message file for %2.')