Shell script using Office 365 CLI v2 to group enable and connect a MS Team to an existing SharePoint Online classic team site.

teamify-classicsite.sh

#!/usr/bin/env bash

help() {
  echo
  echo " ****************************************************************"
  echo " **  Teamify Classic Site "
  echo " **  "
  echo " **      Simple script to Groupify and Teamify a SharePoint Online Classic site" 
  echo " ** "
  echo " **      Usage: ./teamify-classicsite.sh  -s|--siteUrl [classic site url] -a|--alias [alias] -d|--description [description]"
  echo " ** " 
  echo " **           -s|--siteUrl [classic site url] - url of the classic site to move"
  echo " **           -a|--alias [alias] - alias to be used for the amail alais of the Office 365 group"
  echo " **           -d|--description [description] - description of the group"
  echo " ** "
  echo " **      Example: "
  echo " **         ./teamify-classicsite.sh  -s https://contoso.sharepoint.com/sites/classicsite -a 'groupifiedclassicsite' -d 'Groupified Site'"
  echo " ** "
  echo " ** "
  echo " ****************************************************************"
}

CLASSIC_URL=""
ALIAS=""
DESCRIPTION=""
PAUSE=120

# script arguments
while [ $# -gt 0 ]; do
  case $1 in
    -s|--siteUrl)
      shift
      CLASSIC_URL=$1
      ;;
    -a|--alias)
      shift
      ALIAS=$1
      ;;  
    -d|--description)
      shift
      DESCRIPTION=$1
      ;;  
    -h|--help)
      help
      exit
      ;;
    *)
      echo "Invalid argument $1"
      help
      exit 1
  esac
  shift
done

# Check prerequisite for Office 365 CLI
echo 'Checking script prerequisites...'
    set +e
    echo 'Checking for jq...'
    _=$(command -v jq);
    if [ "$?" != "0" ]; then
      echo 'ERROR'
      echo
      echo "You don't seem to have jq installed."
      echo "See https://stedolan.github.io/jq/ for installation and usage."
      exit 1
    fi;
    echo "OK"

echo 'Checking for Office 365 CLI...'
      _=$(command -v o365);
      if [ "$?" != "0" ]; then
        echo 'ERROR'
        echo
        echo "You don't seem to have the Office 365 CLI v2 installed."
        echo "See https://pnp.github.io/office365-cli/ for installation and usage."
        exit 1
      fi;
    echo "OK"
set -e

if [ -z "$CLASSIC_URL" ]; then
  help
  exit 1
fi

if [ -z "$ALIAS" ]; then
  help
  exit 1    
fi

if [ -z "$DESCRIPTION" ]; then
  help
  exit 1    
fi

existingGroup=$(o365 spo site get --url $CLASSIC_URL  --output json | jq -r '.GroupId')
if [[ "$existingGroup" == "00000000-0000-0000-0000-000000000000" ]]; then
    
    echo "Creating Group..."  
    # Other options are avaiable for groupify command.  See docs or help for all details. 
    groupId=$(o365 spo site groupify --siteUrl "$CLASSIC_URL" --alias "$ALIAS" --displayName "$DESCRIPTION" --isPublic --output json | jq -r '.GroupId')
    if [ -z "$groupId" ]; then
        echo "Error! Group ID is null ($groupId). Ensure ${CLASSIC_URL} exists"
        exit 1    
    fi
  
    echo "Creatied Group with ID : $groupId"  
  
    #sleep for a few seconds for graph to create
    echo "Sleeping for $PAUSE seconds to await groupId $groupId availability."
    sleep $PAUSE

    # # Create the Team for the group 
    o365 teams team add --groupId $groupId

    echo "Completed Team-ifying ${CLASSIC_URL} with Group ID $groupId."

else 
  echo "Error! GroupId is ${existingGroup}. Ensure ${CLASSIC_URL} exists and is not already groupified!"
  exit 1    
fi